Sets

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New answer posted•a year ago
A
a year ago

A = { z ∈ c : 1 ≤ | z − ( 1 + i ) | ≤ 2 }

| z − ( 1 + i ) | ≥ 1

and  | z − ( 1 + i ) | ≤ 2

and also | z − ( 1 − i ) | = 1  

hence B has infinite set.

 

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New answer posted•a year ago
New answer posted•a year ago
P
a year ago

x4? 3x3? 2x2+3x+1=0

? x=±1

and let, are roots of x2 – 3x – 1 = 0

? ? +? =3? ? =? 1

? 13+ (? 1)3+? 3+? 3

= 27 + 3 (3) = 36

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New answer posted•a year ago
V
a year ago

f ( x − y ) = 2 x f ( y ) + 4 y f ( x ) ……. (i)

f ( y + x ) = 2 y f ( x ) + 4 x f ( y )  ……. (ii)

(i) – (ii)

∴ f ' ( 4 ) f ' ( 2 ) = k ( 1 6 l n 2 − 2 5 6 l n 4 ) k ( 4 l n 2 − 1 6 l n 4 )

= ( 1 6 − 5 1 2 ) l n 2 ( 4 − 3 2 ) l n 2 = 4 9 6 2 8

1 4 f ' ( 4 ) f ' ( 2 ) = 2 4 8

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New answer posted•a year ago
A
a year ago

3cos22θ + 6cos2θ -   1 0 ( 1 + c o s 2 θ ) 2 + 5 = 0

c o s 2 θ ( 3 c o s 2 θ + 1 ) = 0

 Þ cos2θ = 0,     − 1 3

Draw y = cos2θ, y = 0 and y =  − 1 3 ,  find the pt. of intersection.

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New answer posted•a year ago
A
a year ago

 C⊆A  and  C∩B=φ

If C is formed only by {1, 2, 4, 5} total number of subsets of A = 27.

Total number of subsets of {1, 2, 4, 5} = 24

∴ Number of subsets where C∩B≠φ

= 27 – 24 = 112

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New answer posted•a year ago
New answer posted•a year ago
New answer posted•a year ago
New answer posted•a year ago
M
a year ago

The Commission prepared four sets of question paper having identical questions but at different serial number. The candidates were distributed these question papers as per the seating plan prepared and approved by the local exam designated authority. The Tamil Nadu Public Service Commission will con

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