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If `f:R rarrR, g:R rarrR` are defined by `f(x)=3x-2, g(x)=x^(2)+1`, then `(fog)(x^(2)+1)=`

A

`3x^(4)+6x^(2)+4`

B

`9x^(2)-1`

C

`3x^(2)+1`

D

`3x^(2)-1`

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DIPTI PUBLICATION ( AP EAMET)-FUNCTIONS-EXERCISE 1A(FUNCTIONS)
  1. If f:R rarr R, g:R rarr R are defined by f(x)=x^(2)+2x-3, g(x)=3x-4, t...

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  2. If f:R rarr R, g:R rarr R are defined by f(x)=4x-1, g(x)=x^(3)+2, then...

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  3. If f:R rarrR, g:R rarrR are defined by f(x)=3x-2, g(x)=x^(2)+1, then (...

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  4. Let g(x)=1+x-[x] and f(x)=-1 if x lt 0 =0 if x=0 then f[g(x)]= =1 ...

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  5. If f(x)={{:(x^(3)+1",",x lt0),(x^(2)+1",", x ge0):}, g(x)={{:((x-1)^(1...

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  6. If f(x)=x^(3)-x, g(x)=sin 2x, then

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  7. If f(x)=logx, g(x)=x^(3) then f[g(a)]+f[g(b)]=

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  8. If f:R rarrR and g:R rarrR are defined by f(x)=2x+3, g(x)=x^(2)+7 then...

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  9. If f:RR rarrRR and g:RR rarrRR are defined by f(x)=2x+3 and g(x)=x^(2)...

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  10. Suppose f:[-2, 2] rarr RR is defined by f(x)={{:(-1" for "-2 le x le 0...

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  11. Let Q be the set of all rational number in [0, 1] and f:[0, 1]rarr[0, ...

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  12. If f : R rarr R and g: R rarr R are given by f(x)=|x| and g(x)={x} for...

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  13. If g[f(x)]=|sinx|, f[g(x)]=(sinsqrtx)^(2) then

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  14. If g[f(x)]=|sinx|, f[g(x)]=(sinsqrtx)^(2) then

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  15. If f(n)=(-1)^(n-1)(n-1) and g(n)=n-f (n)AA n in N then (gog)(n)=

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  16. If f(x) =(p-x^n)^(1/n) ,p >0 and n is a positive integer then f[f(x)] ...

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  17. If f(x)=(25-x^(4))^(1//4) for 0 lt x lt sqrt5 then f(f((1)/(2)))=

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  18. If f:[-6, 6]rarr RR defined by f(x)=x^(2)-3" for " x in R then (fofof...

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  19. If f(x)=(1)/(sqrt(x+2sqrt(2x-4)))+(1)/(sqrt(x-2sqrt(2x-4))) for x gt 2...

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  20. If f(x)=sin^(2)x+sin^(2)(x+pi//3)+cosxcos(x+pi//3) and g(5//4)=1 then ...

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