Question # 1

If A and B are two matrices, then:

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A B = O

AB = BA

AB = I

AB may not be defined

If A is a square matrix, then:

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|A^t| = A

|A^t| = -A

|A^t| = |A|

A^t= A

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

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1

none of these

Zero is:

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a natural number

a whole number

a positive integer

a negativeinteger

If the sum of the roots of ax² - (a + 1) x + (2a + 1) = 0 is 2, then the product of the roots is:

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1

2

3

4

A statement which is true for all possible values of the variables involved in it, is called a:

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tautology

conditional

implication

absurdity

The other name of quadratic equation is:

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linear equation

1st degree equation

2nd degree equation

none

Inverse sine function is written as:

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(sin x)^-1

sin x^-1

arc sinx

arc sin^-1 x

Two A.Ms. between 3 and 9 are:

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3. 6

5, 7

6, 12

3, 9

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If there are six G.Ms between 3 and 284 then G₄ =

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24

48

12

6

A set having no element is called:

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null set

subset

singleton

superset

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If A = [aij] and B = [bij] are two matrices of same order r × s, then order of A - B is:

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r - s

r × s

r + s

none of these

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A is superset of B

B is superset of A

A is subset of B

A is equivalent to B

If A is a square matrix, then A + A^t is:

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Probability of an impossible event is:

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0

1

-1

∞

Conjugate of -3 -2 i is:

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3 + 2i

-3 + 2i

2 + 3i

-2 + 3i

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Equations having a common solution are called:

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linear

quadratic

homogeneous

simultenaeous

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