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

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

A

f(g(a) + g(ab))

B

f(g(ab))

C

g(f(ab))

D

g(f(a)+f(b))

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • If f(x) =x and g(x) =|x| , then f(x) + g(x) is equal to

    A
    0
    B
    `2x`
    C
    `2x` if `x ge 0` , 0 if `x lt 0`
    D
    `2x` if `x ge 0, -2x` if `x lt 0`

  • If f(x) =|x| ,g(x)=x then f(x) + g(x) is equal to:

    A
    `-2f`
    B
    `2|f|`
    C
    2f
    D
    `-|f|`

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