If 3x+1 /{ 4x} = 7, then find out the value of \frac{3x}{12x^2+29x+1 }

SSC CPO SI and ASI Model Paper 4

Question : 117 of 200

Marks: +1, -0

3x+1 /{ 4x} = 7,

then find out the value of

{3x}/{12x^2+29x+1 }

Solution:

(1)

3x+1/{4x} = 7

12x^2 +1 = 28x

12x^2 = 28x=1     …(i)

∴{3x}/{12x ^2 29x+1}

={3x}/{28x – 1 + 29x + 1}(by i )

{3x}/{57x}=1/19

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