Search Colleges, Courses, Exams, Questions and Articles

Ask a query on 8879100846 Ask Login | Sign Up

 

 
› Tags › Class 12th

Class 12th

Get insights from 11.9k questions on Class 12th, answered by students, alumni, and experts. You may also ask and answer any question you like about Class 12th

Follow Ask Question
11.9k

Questions

0

Discussions

49

Active Users

0

Followers

New answer posted

10 months ago

Class 12th Maths

If the value of l i m x → 0 ( 2 − c o s x c o s 2 x ) ( x + 2 x 2 )  is equal to ea, then a is equal to………
0 Follower 4 Views

R
Raj Pandey

Contributor-Level 9

l i m x → 0 ( 2 − c o s x . c o s 2 x ) x + 2 x 2 ( 1 ∞ )

= l i m x → 0 e 2 ( s i n x c o s 2 x − c o s x . 1 ( − 2 s i n 2 x ) 2 c o s 2 x 2 x )

= l i m x → 0 e 2 ( 1 2 + 1 ) = e 3 = e a

a = 3

New answer posted

10 months ago

Class 12th Maths

Let P be a plane passing through the points (1,0,1) (1,-2,1) and (0,1,-2). Let a vector a → = α i ^ + β j ^ + γ k ^ be such a → that  is the parallel to the plane P, perpendicular to ( i ^ + 2 j ^ + 3 k ^ ) a n d     a →   . ( i ^ + j ^ + 2 k ^ ) = 2 ,  then ( α − β + γ ) 2  equals………
0 Follower 2 Views

R
Raj Pandey

Contributor-Level 9

For the plane P,

n → = 1 2 ( − 2 j ^ ) * ( − i ^ + j ^ − 3 k ^ ) = j ^ * i ^ + 3 j ^ * k ^ = − k ^ + 3 i ^

a → . n → = 0 ⇒ 3 α − γ = 0 . . . . . . . ( i )

a → . ( 1 , 2 , 3 ) = 0 ⇒ α + 2 β + 3 γ = 0 . . . . . . . . . . ( i i )

a → . ( 1 , 1 , 2 ) = 2 ⇒ α + β + 2 γ = 2 . . . . . . . . . . . ( i i i )

(i), (ii) & (iii) Þ a = 1, β = -5, γ = 3

New answer posted

10 months ago

Class 12th English

Eight girls – ATHENA, BRISEIS, CALANDRA, DEMETER, ELLIE, FEO, GAIA, and HELEN are sitting in a row facing North. We know the following information about them.

I. The number of girls to the left of ATHENA is equal to the number of girls to the right of GAIA.

II. CALANDRA is sitting three places away to the left of ELLIE.

III. The number of girls sitting between FEO and DEMETER is two.

IV. If BRISEIS and HELEN interchange their positions, then HELEN is fifth to the right of BRISEIS.

V.  CALANDRA is sitting at the extreme left end of the row.

VI. GAIA is sitting exactly between BRISEIS and DEMETER.

Who is sitting extreme right

...more
0 Follower 1 View

P
Payal Gupta

Contributor-Level 10

According to the information provided in the statement following arrangement will be obtained:

C

H

A

E

D

G

B

F

1

2

3

4

5

6

7

8

New answer posted

10 months ago

Class 12th Maths

The number of rational terms in the binomial expansion of ( 4 1 4 + 5 1 6 ) 1 2 0  is…….
0 Follower 2 Views

R
Raj Pandey

Contributor-Level 9

T r + 1 = 1 2 0 C r     4 1 2 0 − r 4 . 5 r / 6

For to be rational

r should be multiple of 6

Number of such terms = 21

New question posted

10 months ago

Class 12th English

Eight girls – ATHENA, BRISEIS, CALANDRA, DEMETER, ELLIE, FEO, GAIA, and HELEN are sitting in a row facing North. We know the following information about them.

I. The number of girls to the left of ATHENA is equal to the number of girls to the right of GAIA.

II. CALANDRA is sitting three places away to the left of ELLIE.

III. The number of girls sitting between FEO and DEMETER is two.

IV. If BRISEIS and HELEN interchange their positions, then HELEN is fifth to the right of BRISEIS.

V.  CALANDRA is sitting at the extreme left end of the row.

VI. GAIA is sitting exactly between BRISEIS and DEMETER.

Who is sitting extreme r

...more
0 Follower 1 View

New answer posted

10 months ago

Class 12th English

Eight girls – ATHENA, BRISEIS, CALANDRA, DEMETER, ELLIE, FEO, GAIA, and HELEN are sitting in a row facing North. We know the following information about them.

I. The number of girls to the left of ATHENA is equal to the number of girls to the right of GAIA.

II. CALANDRA is sitting three places away to the left of ELLIE.

III. The number of girls sitting between FEO and DEMETER is two.

IV. If BRISEIS and HELEN interchange their positions, then HELEN is fifth to the right of BRISEIS.

V.  CALANDRA is sitting at the extreme left end of the row.

VI. GAIA is sitting exactly between BRISEIS and DEMETER.

How many girls are sitting b

...more
0 Follower 1 View

P
Payal Gupta

Contributor-Level 10

According to the information provided in the statement following arrangement will be obtained:

C

H

A

E

D

G

B

F

1

2

3

4

5

6

7

8

New answer posted

10 months ago

Class 12th English

Eight girls – ATHENA, BRISEIS, CALANDRA, DEMETER, ELLIE, FEO, GAIA, and HELEN are sitting in a row facing North. We know the following information about them.

I. The number of girls to the left of ATHENA is equal to the number of girls to the right of GAIA.

II. CALANDRA is sitting three places away to the left of ELLIE.

III. The number of girls sitting between FEO and DEMETER is two.

IV. If BRISEIS and HELEN interchange their positions, then HELEN is fifth to the right of BRISEIS.

V.  CALANDRA is sitting at the extreme left end of the row.

VI. GAIA is sitting exactly between BRISEIS and DEMETER.

Who is the third from the ri

...more
0 Follower 1 View

P
Payal Gupta

Contributor-Level 10

According to the information provided in the statement following arrangement will be obtained:

C

H

A

E

D

G

B

F

1

2

3

4

5

6

7

8

New answer posted

10 months ago

Class 12th English

Directions for questions: Read the information carefully and answer the questions given below.

Eight girls – ATHENA, BRISEIS, CALANDRA, DEMETER, ELLIE, FEO, GAIA, and HELEN are sitting in a row facing North. We know the following information about them.

I. The number of girls to the left of ATHENA is equal to the number of girls to the right of GAIA.

II. CALANDRA is sitting three places away to the left of ELLIE.

III. The number of girls sitting between FEO and DEMETER is two.

IV. If BRISEIS and HELEN interchange their positions, then HELEN is fifth to the right of BRISEIS.

V.  CALANDRA is sitting at the extreme left end of

...more
0 Follower 1 View

P
Payal Gupta

Contributor-Level 10

According to the information provided in the statement following arrangement will be obtained:

C

H

A

E

D

G

B

F

1

2

3

4

5

6

7

8

New answer posted

10 months ago

Class 12th English

Five friends – Umang, Viren, Xavier, Falak and Gagan collected gold on the sea shore. They collected a total of 100 gold.

None of them collected less than 10 gold each. No two among them collected the same number of gold. Following information is given regarding the number of gold with each one of them:

I.    Umang collected the same number of gold as Viren and Xavier put together.

II.  Xavier collected 3 more gold than the cube of an integer.

III. The number of gold collected by Umang was the square of an integer.

IV. The number of gold collected by Viren was the square of an integer.

V.  The number of gold

...more
0 Follower 1 View

P
Payal Gupta

Contributor-Level 10

U – Umang

V – Viren

X – Xavier

F – Falak

G – Eagan

We have

U + V + X + F + G = 100

And each one of U, V, W, X, F, G? 10

U = V + X and 3Y = 4Z

Now,  U, V, X, F, G? 10

Also, U = V + X

X = Cube + 3

V, U = Square

and F : G = 4 : 3

This is possible only when

U = 36, V = 25, X = 11, G = 12, F = 16

New answer posted

10 months ago

Class 12th English

Five friends – Umang, Viren, Xavier, Falak and Gagan collected gold on the sea shore. They collected a total of 100 gold.

None of them collected less than 10 gold each. No two among them collected the same number of gold. Following information is given regarding the number of gold with each one of them:

I.    Umang collected the same number of gold as Viren and Xavier put together.

II.  Xavier collected 3 more gold than the cube of an integer.

III. The number of gold collected by Umang was the square of an integer.

IV. The number of gold collected by Viren was the square of an integer.

V.  The number of gold

...more
0 Follower 1 View

P
Payal Gupta

Contributor-Level 10

U – Umang

V – Viren

X – Xavier

F – Falak

G – Eagan

We have

U + V + X + F + G = 100

And each one of U, V, W, X, F, G? 10

U = V + X and 3Y = 4Z

Now,  U, V, X, F, G? 10

Also, U = V + X

X = Cube + 3

V, U = Square

and F : G = 4 : 3

This is possible only when

U = 36, V = 25, X = 11, G = 12, F = 16

Get authentic answers from experts, students and alumni that you won't find anywhere else

Sign Up on Shiksha

On Shiksha, get access to

  • 66k Colleges
  • 1.2k Exams
  • 703k Reviews
  • 1850k Answers

Share Your College Life Experience

Write a Review
Community GuidelinesUser Points System
QuestionsDiscussionsTags

×

This website uses Cookies and related technologies for the site to function correctly and securely, improve & personalise your browsing experience, analyse traffic, and support our marketing efforts and serve the Core Purpose. By continuing to browse the site, you agree to Privacy Policy and Cookie Policy.