Class 12th

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New answer posted

3 months ago

0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

|3a+4b|² = 9|a|² + 16|b|² + 24a·b
But a·b = 0, |a|=|b|=k
|3a+4b| = 5k
|4a-3b|
10k = 20? k = 2 = |a| = |b|

New answer posted

3 months ago

0 Follower 13 Views

S
Swayam Gupta

Contributor-Level 9

Biomolecules are organic compounds essential for life; they are found in all living organisms. In chemistry class 12, we talked about the following biomolecules: carbohydrates, proteins, lipids, nucleic acids, enzymes, and vitamins. 

Biomolecules chemistry class 12 connects biology and chemistry and helps us understand metabolism, heredity, and biochemical reactions. 

New answer posted

3 months ago

0 Follower 16 Views

S
Swayam Gupta

Contributor-Level 9

You must use the NCERT for the CBSE Class 12 board exams. The NCERT textbook is enough for understanding the Biomolecules. All concepts, definitions, and reactions asked in the exams are directly covered in the textbook. We have provided NCERT Solutions for Class 12 Chemistry, Biomolecules, as well as for better practice.

However, for competitive exams like NEET and JEE, while NCERT remains an important resource, students should also solve additional questions from reference books like MTG NCERT at Your Fingertips, NCERT Exemplar, or practice modules by coaching institutes. These help build speed, accuracy, and deeper conceptual clarity

...more

New answer posted

3 months ago

0 Follower 5 Views

V
Vishal Baghel

Contributor-Level 10

Differentiable ⇒ continuous
Continuous at x = 2 ⇒ 2a + b = 0
Continuous at x = 3
0 = 9p + 3q + 1
Differentiable at x=2
a = 2*2 - 5 ⇒ a = -1
Differentiable at x=3
2*3 - 5 = 2p*3 + q ⇒ 6p + q = 1
a = -1, b = 2, p = 4/9, q = -5/3

New answer posted

3 months ago

0 Follower 2 Views

V
Vishal Baghel

Contributor-Level 10

For point of intersection
1 + 3λ = 3 + μ
2 + λ = 1 + 2μ
5λ = 5 ⇒ λ = 1, μ = 1
Point of intersection (4, 3, 5)
For the greatest distance from origin perpendicular from meet plane at point of intersection
Hence equation r . (4i + 3j + 5k) = 50

New answer posted

3 months ago

0 Follower 3 Views

V
Vikash Kumar Vishwakarma

Contributor-Level 8

Foods that contains nucleic acids are animal products such as meat, eggs, fish and few plant-based sources are legumes, spinach, mushrooms, yeast and cereals. Adding these foods in the diet will support the body's nucleic acid pool, which is important for cellular function.

New answer posted

3 months ago

0 Follower 3 Views

V
Vishal Baghel

Contributor-Level 10

f' (x) = x (1+y)
dy/ (y+1) = xdx
ln (y+1) = x²/2 + c
(0,0)
c = 0
y+1 = e^ (x²/2) ⇒ e^ (x²/2) = 2
x²/2 = k = (ln2 > 0)
x = ±√2k

New answer posted

3 months ago

0 Follower 2 Views

R
Raj Pandey

Contributor-Level 9

B ? 1 = E 1 c c o s ? ( k z - ω t ) B ? 1    where   B ? 1 = c ˆ 1 * E ? 1 = k ˆ * i ˆ = B ? 1 = j ˆ

B ? 2 = E 2 c c o s ? ( k z + ω t ) B ? 2 where B ? 2 = c ˆ 2 * E ? 2 = - k ˆ * j ˆ = B ? 2 = i ˆ

B ? = B ? 1 + B ? 2

B ? = E 1 c j ˆ c o s ? ( k z - ω t ) + E 2 c i ˆ c o s ? ( k z + ω t )

New answer posted

3 months ago

0 Follower 17 Views

V
Vishal Baghel

Contributor-Level 10

f (x) = x? /20 - x? /12 + 5
f' (x) = x? /4 - x³/3 = x³ (x/4 - 1/3)
Local maxima at 0, Local minima at 4/3
f' (x) = x³ - x² = x² (x-1)
x = 1 point of inflection

New answer posted

3 months ago

0 Follower 3 Views

V
Vishal Baghel

Contributor-Level 10

dy/√ (1-y²) = dx/x²
sin? ¹ (y) = -1/x + c ⇒ c = π/2
sin? ¹ (y) = -π/3 + π/2 = π/6
y = 1/2

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