Question # 1

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

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0

2

4

7

The vertex of the parabola (xsin a -ycos a)2 =4a(xcos a +ysin a) lies at

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(acos a,asin a)

(a,0)

(cos a,sin a)

(0,0)

The domain of the function x/x² -4 is given by

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R

R + 2

[R - (+2)

R-4

The period of tan x/7 is

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3π

7π

15π

5π

Sin 270° = ______

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-1

0

1

Undefined

For graphing a linear inequality, solid line is drawn if the inequality involves the symbols:

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> or <

= or≠

= or >

If one root of the equation x²- 3x + a = 0 is 2 then a = ______

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0

1

2

3

If a=5j + 2j,b=2i -3j, then|a+2b|=

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√21

√97

√39

None of these

The solution set of x²- 5x + 6 = 0 is

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{1, 3}

{2, 3}

{1, 2}

None of these

The roots of the equation ax²+ bx + c = 0 are real and equal if

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b²- 4ac < 0

b²- 4ac = 0

b²- 4ac > 0

None of these

Rank of matrix [1 3 5 0] is

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1

3

2

4

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