Question # 1

If ab > 0 and a < 0, which of the following is negative?

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b

-b

-a

(a - b)²

Given X, Y are any two sets such that number of elements in X=28, number of elements in set Y=28, and number of elements in set X∪Y=54, then number of elements in set X∩Y=

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-7 + 2i

7 + 2i

7-2i

√53

The set of the first elements of the ordered pairs forming a relation is called its

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-x

does not exist

1/x

0

The conic is a parabola if

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e <1

e > 1

e = 1

e = 0

The range of inequality x + 2 > 4 is

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(-1,2)

(-2,2)

(1,∞)

None

Sin(a + b) + Sin(a- b) =

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Sin a Cos b

Sin a Sin b

Sin a + Cos b

Sin a - 2Cos b

d/dx (3y⁴) =

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12y³ dy/dx

8y³

8y³ dy/dx

12y³

Tan^-1 1/x =______

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Sin x

Sec^-1 X

Cot^-1 X

Sin Ix/cos- Ix

1+2+3+......+n=?

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n(n +1)/2

n +1/2

n(n +1)(2n +1)/6

n³

The Domain of f(x) = log x is

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[0,∞]

(0, ∞)

[0,∞[

[∞ ,∞]

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NAT I Engineering Mathematics MCQs With Answers

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