TS ICET 2015 Question Paper with Solutions for online practice

Question : 128 of 200

Marks: +1, -0

If 7 + 10x - 5

x^2

has maximum at x = α ∊ R, then a =

Solution:

We know that

ax^2+bx+c

has the maximum value at

x={-b}/{2a}

Given expression :

–5x^2+10x+7

Here

,a=–5,b=10,c=7

∴α={-10}/{2(-5)}=1

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