Question # 1

The product of complex numbers (a,b) and (c,d) is

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(ac, bd)

(ac-bd, ad+bc)

(ab,cd)

(ac+bd,ad-bc)

The transport of a null matrix is

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Row matrix

Column matrix

Square matrix

Null matrix

If s = 2t³- 3t²+ 15t - 8 is the equation of motion of a particle, then its initial velocity is

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8

15

-6

None

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1

0

3

-3

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The graph of a quadratic function is

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Circle

Straight line

Parabola

Triangle

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A

B

A'

None of these

The key for opening a door is in a bunch of 10 keys. A man attempts to open the door by trying the keys at random discarding the wrong key. The probability that the door is opened in the 5th trial is

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1 / 10

2 / 10

3 / 10

4 / 10

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0

1

1/2

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An empty set

Universal set

A singleton set

None of these

The coefficient of the second term of (a+b)⁴ is

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1

9

3

5

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