Question # 1

If the vector 2i+4j-2k and 2i +6j+xk are perpendicular then x-7

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4

8

14

7

Which is not included in the domain of Cos^-1 x

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0

1

-1

2

The fifth term of the sequence a_n = 3n - 2 is

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3

-3

13

-13

An m x n matrix is said to be rectangular if

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Forms a group w.r.t. addition

Non commutative group w.r.t. multiplication

Forms a group w.r.t. multiplication

Doesn't form a group

The sum of the ages of Nazish and his son is 56 years. Eight years ago. Nazish was 3 time as old as his son. How old is the son now?

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m = n

m ≠ n

mn = 1

mn = 0

Second derivative of y = x⁹ + 10x² + 2x -1 at x = 0 is

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10

20

12

1

One of the roots of the equation 2x² + 3x + n = 0 is the reciprocal of the other, then n = --------------------

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Both A,B have the same number of columns

Both A,B do not have the same order

Number of col A is same as number of rows of B

Number of rows of A is same as number of col of B

Cot 360° =______.

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Undefined

0.707

-0.5

0

The set {1, -1, i, -i}, form a group under

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addition

multiplication

subtraction

None

If f(x) : A → B and g (x) : A → B then Dom [f(x) + g(x)] is

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Dom f(x) ∩ Dom g (x)

Dom f(x) ∪ Dom g(x)

[Domf(x)]² - [Dom g(x)]²

[Dom g(x)]²-[Domf(x)]²

√23 is

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A rational number

A irrational number

An even integer

A factor of 36

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