If g(x)=x^2+x-1 and (g f)(x)=4x^2-10x+5 then f(2) is equal to

MHT CET 2024 Mathematics question

If and then is equal to

Answer: (A)

. Assume is linear, (the natural reading for this problem). Then , so , and gives or . With : gives , which satisfies

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Question ID VK-093136