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If f(x) = -2x+7 is 15, what is f^-1 (15)?
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If f(x) = -2x+7 is 15, what is f^-1 (15)?

User ShirazITCo
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1 Answer

1 vote

Answer:
f^(-1)(15)=-4

Explanation:


f^(-1)(15)=k \implies f(k)=15\\\\\therefore -2k+7=15\\\\\implies -2k=8\\\\\implies k=-4

User Raees Iqbal
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