If $F\left(x+\frac1{x}\right)=x^2+\dfrac1{x^2},$ what is the value of $F(4)+F(5)?$

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by M7MBA » Sun Dec 27, 2020 7:58 am

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If $F\left(x+\frac1{x}\right)=x^2+\dfrac1{x^2},$ what is the value of $F(4)+F(5)?$

A. 9
B. 16
C. 25
D. 37
E. 41

Answer: D

Source: e-GMAT

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Source: Beat The GMAT — Problem Solving | Sun Dec 27, 2020 7:58 am

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