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Questions  

A region in the x-y plane is bounded by the curve y=25x2 and the line y =0 If the point (a, a+ 1) lies in the interior of the region then,

a
a∈(−4,3)
b
a∈(−∞,−1)∈(3,∞)
c
a∈(−1,3)
d
none of these

detailed solution

Correct option is C

y=25−x2 and y=0 bound the semicircle above the x-axis. Therefore,a+1>0…………(i)and a2+(a+1)2−25<0 or 2a2+2a−24<0or a2+a−12<0or  −4

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