Question # 1

The quadratic equation 8 sec²θ- 6 secθ+1 = 0 has

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Infinitely many roots

Exactly two roots

Exactly four roots

No roots

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The harmonic mean between a and b is

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For each natural number n, n (n+1) is

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an even

an odd

multiple of 3

Irrational

The range of inequality x + 2 > 4 is

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(-1, 2)

(-2, 2)

(1,∞)

None

The number of subsets of a set having three elements is

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4

6

8

none of these

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In an A.P,a +(n-a)d is

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1st term

General term

Last term

None of these

Which of the following is a vector.

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energy

force

work

power

The equation of the circle with centre (-h, -k) and radius r is

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(x +h)²+ (y+k)²= r²

(x +h)²+ (y-k)²= r²

(x -h)²+ (y+k)²= r²

(x -h)²+ (y-k)²= r²

Optimize means ______ a quantity under certain constraints

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Minimize

Maximize

Maximize or minimize

None of these

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