Question # 1

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none of these

The axis of the parabola x² = 4ay is:

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y = 0

x = 0

x = -a

y = a

14 is not a

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Prime number

Whole number

Even number

Real number

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none of these

The direction cosines of a line equally inclined with co-ordinate axes are

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If a set S contains "n" elements then P (S) has ...... number of elements

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2ⁿ

2²ⁿ

2 . n

n²

If z1 = 2 + 6i and z2 = 3 + 7i then which expression defines the product of z1 and z2

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36 +(-32)i

-36+32i

6+(-11)i

0, +(-12)i

The formula an = arn-1represents

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nth term of G.P

Sum of the first n terms

G.M between a and b

None of these

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0

2

4/3

5/3

The coefficient of x¹⁸ in (ax⁴-bx)⁹ after expansion is

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84a³ b⁶

22a³b⁶

27a⁴b⁵

28a³b⁶

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