If X+1/X=4, then the value of \frac{4X}{7X^2-4X+7}=?

SSC CPO SI and ASI Model Paper 10

Question : 119 of 200

Marks: +1, -0

X+1/X=4

, then the value of

{4X}/{7X^2-4X+7}=?

Solution:

(1)

{4x}/ {7x^2- 4x +7}=4x/{x[7x-4+7/x]}

=4/{7[x+1/x]-4}=4/{(7×4-4)}

4/26=1/6

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