NIMCET 2020 Question Paper with solutions

Question : 14 of 120

Marks: +1, -0

Roots of equation

ax^2 - 2bx + c = 0

are n and m, then the value of

b/{an^2+c}+b/{am^2+c}

Solution:

m & n are roots

am^2-2bm+c=0 \;&\; an^2-2bn+c=0

am^2+c=2bm\;\; an^2+c=2bn

∴ b/{2bn}+b/{2bm}

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