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Let C denote the set of all complex numb...

Let `C` denote the set of all complex numbers. A function `f: C->C` is defined by `f(x)=x^3` . Write `f^(-1)(1)` .

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

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

`Rightarrow {x}^{3}=1 ldots ldots ldots ldots ldots[text { Given }] `

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

After solving `x^{2}+x+1=0`, we get `x=frac{1 pm sqrt{3} i}{2}`

Let, `w=frac{1 pm sqrt{3} i}{2}`

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RD SHARMA-FUNCTION-Solved Examples And Exercises
  1. If f: C->C is defined by f(x)=x^2 , write f^(-1)(-4) . Here, C denotes...

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  2. If f: R->R is given by f(x)=x^3 , write f^(-1)(1) .

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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