Question # 1

5th term of a G.P. is 2, then the product of first 9 terms is

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256

128

512

None of these

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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

If Z₁= 1 + i, Z₂= 2+3i, then |Z₂- Z₁| = ?

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all are correct

The set of all positive even integers is

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Not a group

A group w.r.t subtraction

A group w.r.t division

A group w.r.t multiplication

A function f is said to be an even if f(-x) =

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0

1

f(x)

-f(x)

In R the number of identity elements w.r.t.'.' is

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One

Two

Three

Four

The modulus of a vector i-i+ k is:

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√3

1

√2

∞

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3

2

8

0

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