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Let f:R rarrR be defined as f(x) = 3x ...

Let `f:R rarrR` be defined as f(x) = 3x Choose the correct answer

A

f' is one-one onto

B

f' is many-one onto

C

'f' is one-one but not onto

D

f' is neither one-one nor onto

Text Solution

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The correct Answer is:
A
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V PUBLICATION-RELATIONS AND FUNCTIONS-QUESTION BANK
  1. Let A=R-{3} and B=R-{1} Consider the function f:ArarrB defined by f(x)...

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  2. Let f:R rarrR be defined as f(x) = x^4 Choose the correct answer

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  3. Let f:R rarrR be defined as f(x) = 3x Choose the correct answer

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  4. Let f:{2,3,4,5} rarr {3,4,5,9} and g:{3,4,5,9} rarr{7,11 , 15} be func...

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  5. Find g o f and f o g, if f: R rarr R and g: R rarr R are given by f (x...

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  6. Show that if f: A rarr B and g: B rarr C are one-one, then gof : A rar...

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  7. Show that if f: A rarr B and g: B rarr C are onto, then gof : A rarr C...

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  8. Are 'f' and 'g' both necessarily onto, if gof, is onto?

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  9. Let f:{1 , 2,3 ,} rarr {a, b, c} be one-one, and onto function given b...

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  10. Consider f : R rarr R given f(x) = 4x + 3. Show that f is invertible. ...

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  11. Consider of f : N rarrN and h : N rarr R defined as f(x) = 2x, g(y) = ...

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  12. Let S = {1, 2, 3}. Determine whether the function f : S rarr S defined...

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  13. Let f : {1, 3, 4} rarr {1, 2, 5} and g : {1, 2, 5} rarr (1, 3} be gi...

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  14. Let f, g, and h be functions from R to R. Show that (f + g) o h = fo...

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  15. Find f o g and g o f f(x) = |x| and g(x) = |5x -2|

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  16. If f(x) =(4x + 3)/(6x - 4), x ne 2/3, show that (fof)(x) = x, for all ...

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  17. State with reason whether the following functions have inverse f : {...

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  18. Show that f:[-1,1]toR given by f(x)=frac(x)(x+2) is one-one.

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  19. Consider f : R rarr R given f(x) = 4x + 3. Show that f is invertible. ...

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  20. Consider f:R^+to[-5, infty) given by f(x)=9x^2+6x-5. Show that f is ...

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