Question # 1

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

If n is add the expansion (a + x)ⁿhas middle terms

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2

3

4

5

The three consecutive numbers a,√ab,b are in

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G.P

H.P

G.M

None of these

Let the equation ax²- bx + c = 0 have distinct real roots both lying in the open interval (0, 1) where a, b, c are given to be positive integers. Then the value of the ordered triplet (a, b, c) can be

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(5, 3, 1)

(4, 3, 2)

(5, 5, 1)

(6, 4, 1)

The distance between the points (0 , 0) and (2, 1) is

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5

0

3

The general term in the expansion of (a+x)n is

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(r-1)th term

(r+1)th term

rth term

none

The seventh term of (x3+1/x)8is

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71

-22

27

28

The sum of coefficients in the binomial expansion equals to

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2

2ⁿ⁺¹

2^n-1

2ⁿ

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cos x

sec x tan x

sec²x

-cosec²x

If A ⊆ B then A ∪ B is

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A

B

A'

A ∩B

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0

2

4/3

5/3

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