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Let f be a function from C (set of all c...

Let `f` be a function from `C` (set of all complex numbers) to itself given by `f(x)=x^3` . Write `f^(-1)(1)` .

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Let `{f}^{-1}(-1)={x} quad-(1)`

`Rightarrow {f}({x})=-1`

`Rightarrow {x}^{3}=-1 ldots ldots ldots ldots ldots[.` Since, `{f}({x})={x}^{3}` ]

`Rightarrow {x}^{3}+1=0`

`Rightarrow({x}+1)({x}^{2}-{x}+1)=0 quad[{a}^{3}+{b}^{3}=({a}+{b})({a}^{2}-{ab}+{b}^{2})]`

Let `{f}^{-1}(-1)={x}`

`Rightarrow {f}({x})=-1`

`Rightarrow {x}^{3}=-1 ldots ldots ldots ldots ldots ldots[.` Since, `.{f}({x})={x}^{3}]`

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RD SHARMA-FUNCTION-Solved Examples And Exercises
  1. If f: R->R is given by f(x)=x^3 , write f^(-1)(1) .

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  2. Let C denote the set of all complex numbers. A function f: C->C is def...

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  3. Let f be a function from C (set of all complex numbers) to itself g...

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  4. Let f: R->R be defined by f(x)=x^4 , write f^(-1)(1) .

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  5. If f: C->C is defined by f(x)=x^4 , write f^(-1)(1) .

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  6. If f: R->R is defined by f(x)=x^2 , write f^(-1)(25) .

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  7. If f: C->C is defined by f(x)=(x-2)^3 , write f^(-1)(-1) .

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  8. If f: R->R is defined by f(x)=10 x-7 , then write f^(-1)(x) .

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  9. Let f:{-pi/2,\ pi/2}->R be a function defined by f(x)=cos[x]dot Write ...

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  10. If f: R->R defined by f(x)=3x-4 is invertible then write f^(-1)(x) .

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  11. If f: R->R , g: R->R are given by f(x)=(x+1)^2 and g(x)=x^2+1 , then w...

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  12. Let A={x in R :-4lt=xlt=4 and x!=0} and f: A->R be defined by f(x)=(|...

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  13. Let f:[-pi/2,\ pi/2]->A be defined by f(x)=sinx . If f is a bijection,...

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  14. Let f: R->R^+ be defined by f(x)=a^x ,\ a >0 and a!=1 . Write f^(-1)(x...

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  15. Let f: R-{-1}->R-{1} be given by f(x)=x/(x+1) . Write f^(-1)(x) .

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  16. Let f: R-{-3/5}->R be a function defined as f(x)=(2x)/(5x+3) . Write f...

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  17. Let f: R->R , g: R->R be two functions defined by f(x)=x^2+x+1 and g(x...

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  18. Let f: R->R be defined as f(x)=(2x-3)/4 . Write fof^(-1)(1) .

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  19. Let f be an invertible real function. Write (f^(-1)\ of)(1)+(f^(-1)...

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  20. Let A={1,\ 2,\ 3,\ 4} and B={a ,\ b} be two sets. Write total numbe...

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