= 1 26. If x + 5, then find the val...
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= 1 26. If x + 5, then find the value of 5x +(5x-11x +5) RRB NTPC (Phase 1) 2016

11th - 12th Class
Maths
Solution
140
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( 26 .left(^{*}right) ) Given, ( x+frac{1}{x}=15 ) ( begin{aligned} therefore quad frac{5 x}{5 x^{2}-11 x+5} &=frac{5 x}{xleft(5 x-11+frac{5}{x}right)} &=frac{5}{5 x+frac{5}{x}-11} &=frac{5}{5left(x+frac{1}{x}right)-11} &=frac{5}{5 times 15-11}=frac{5}{75-11} &=frac{5}{64} end{aligned} )
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