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Let C and R be the sets of complex numb...

Let C and R be the sets of complex numbers and real numbers respectively. Then the mapping `f:c to R` defined by f(z)=|z| for all `z in C`, is -

A

injective

B

surjective

C

bijective

D

none of these

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The correct Answer is:
D
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CHHAYA PUBLICATION-MCQ ZONE -Question Paper 2
  1. The relation R is defined on the set of natural numbers N as x is a f...

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  2. The value of sin((1)/(2)"cos"^(-1)(4)/(5)) is -

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  3. Let C and R be the sets of complex numbers and real numbers respectiv...

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  4. Let X be the random variable of the number of points obtained in singl...

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  5. If n and p are two parameters of a binomial distribution, state which ...

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  6. The domain of definition of the function sin^(-1)[log(3)((x)/(3))] is ...

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  7. The value of cot((pi)/(4)-2cot^(-1)3) is -

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  8. If y=sqrt(sin sqrt(x)), then the value of (dy)/(dx) is -

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  9. If f(x)=cos^(-1)[(1-(logx)^(2))/(1+(logx)^(2))], then the value of f'...

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  10. If y=a cos m x-b sin m x, then the value of (d^(2)y)/(dx^(2)) is -

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  11. If y=x^(e^(x)), then the value of (dy)/(dx) is -

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  12. If 2^(x)+2^(y)=2^(x+y), then the value of (dy)/(dx) at x=y=1 is -

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  13. If f(x)=x(x-1)(x-2), 0 le x le 4, then the point x=c which satisfies m...

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  14. Let f(x)=x|x|. Then the set of points where f(x) is twice differentiab...

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  15. If x=sin^(-1) t, y=log(1-t^(2)), 0 le t lt 1, then the value of (d^(2...

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  16. If 2a+3b+6c=0 " "(a, b, c in R), then the quadratic equation ax^(2)...

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  17. If y=(x+sqrt(1+x^(2)))^(n), then (1+x^(2))(d^(2)y)/(dx^(2))+x(dy)/(d...

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  18. If sin y+e^(-x cos y)=e, then the value of (dy)/(dx) at (1, pi) is -

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  19. If x=2 cos t+cos 2t and y=2 sin t-sin2t, then the value of (dy)/(dx) a...

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  20. The value of lim(x to oo) (sqrt(x^(2)+ax)-x) is -

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