Question # 1

The first three terms in the expansion of (1 + x)^-2are ______

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1 - 2x + 3x²

1 - 2x - 3x²

1 + 2x + 3x²

-2 -2x + 3x²

Sine rule for a triangle states that

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a/sin A = b/sin B = c/sin C

sin A/a = sin B/b = sin C/c

a/sin A + b/sin B + c/sin C

2a/sin A = 2b/sin B = 2c/sin C

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A complex number

A rational number

A natural number

An irrational number

There may be ______ feasible solution in the feasible region

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Infinite

Finite

Defined

None of above

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Domain of 2 cos x is ______

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[-2, 2]

R

Negative real numbers

None of these

Given two numbers a and b. Let A denote the single A.M. between these and S denote the sum of n A.M.'s between them. Then S/A depends upon

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n, a, b

n, a

n, b

n

The set {-1,1} is closed under the binary operation of

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Addition

Multiplication

Subtraction

Division

sin(180° -θ)=

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cosθ

-cosθ

Tanθ

Sinθ

The last term of (1+2x)-2

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(-1)-2 (2x)-2

(-1)-4(-2x)-2

(-1)-3(2x)-3

Does not exist

The general term of the A.P. is

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a₁+ (n - 1) d

n + (a₁- 1) d

d + (n - 1) a₁

None of these

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