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STD 12 - 1. relation and function — Mathematics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceMathematicsSTD 12 - 1. relation and function1 Mark
MCQ
If $f(x) = 2x$ and $g$ is identity function, then
  • A
    $(fog)(x) = g(x)$
  • B
    $(g + g)(x) = g(x)$
  • ✓
    $(fog)(x) = (g + g)(x)$
  • D
    None of these
✓

Answer

Correct option: C.
$(fog)(x) = (g + g)(x)$
c
(c) $(fog)x = 2[g(x)]$ and $(g + g)\,x = 2\,[g(x)].$

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