Question # 1

A matrix of order m×1 is called:

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row matrix

column matrix

identity matrix

scalar matrix

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A.P

G.P

H.P

none

If a_n = (n + 1) a_n-1, a₁ = 1, second term of the sequence is:

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3

1

2

4

If s denotes the length of the arc intercepted on a circle of radius r by a central angle of α radians, then:

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s = rα

s = r + α

none of these

A dice is thrown. The probability to get an odd number is;

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1

none of these

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r₁

r₂

r₃

r

The additive inverse of a matrix A is:

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A

A^-1

- A

A²

If cosec Θ > 0 and cot Θ < 0, then terminal arm of the angle lies in:

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I

II

III

IV

If AB = BA = I, then A and B are:

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equal to each other

multiplicative inverse of each other

additive inverse of each other

both singular

Modulus of 15 i + 20 is:

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20

15

25

none of the above

What is the general term of the sequence 2, 4, 6, 8, ........... ?

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2n

n + 1

2n²

none of these

A circle which touches one side of a triangle externally and the other two produces sides internally is known as:

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If, for all x in the domain of f, there exists a smallest positive number p such that f (x+p) = f(x), then p is the:

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period of f

period of 2f

period of 3 f

period of 4 f

A matrix in which each element is 0 is called:

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In binomial expansion of (a+b)ⁿ, n is positive integer the sum of odd coefficients equals:

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none of these

In circular system the angle is measured in:

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radians

degrees

degrees, minutes

degrees, seconds

The angle between 0° and 360° and co-terminal with - 620° is:

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100°

200°

300°

320°

Every real number is also a/an:

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integer

rational number

irrationalnumber

complexnumber

The middle terms of (x+y)²³ are:

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T₁₀,T₁₁

T₁₁,T₁₂

T₁₂,T₁₃

none of these

Product of a complex number and its conjugate is:

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a real number

irrationalnumber

a complexnumber

either real number or complexnumber

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3×3

3×2

2×1

2×3

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