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Question

If f:R→R f(x)=cos⁡x and g(x)=7x3+6, then fοg(x) is

Options :

  1. cos⁡(7x³+6)

  2. cos⁡x

  3. cos⁡(x³)

  4. cos(x³+6/7)

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Answer :

cos⁡(7x³+6)

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