If 3x+1/4x =7, find the value of 3x/ 12x^2 + 29x + 1 .

RRB NTPC Prelims Model Paper 4 with solutions

Question : 44 of 100

Marks: +1, -0

3x+1/4x =7,

find the value of

3x/ 12x^2 + 29x + 1 .

Solution:

(1)

3x+1/4x =7

⇒12x^2+1=28x

⇒12x^2=28x-1

∴{3x}/{12x^2+29x+1}

={3x}/{28x-1+29x}+1

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

Go to Question:

Prev Question

Next Question