Question

Pls refer to the image and solve fast

Answer 1

Step-by-step explanation:

y= √a+√a+√a to infinity

on squareing both side

y²= a+√a+√a+√a to infinity

y²= a+y [y=√a+√a+√a to infinity]

y²-y-a= 0

it has real and distinct root so,

discriminant>1

D>1

b²-4ac>1

(-1)²-4•1•(-a)>1

1+4a>1

1+4a-1>1-1

4a>0

a>0

option (b) because if a>0 then a >all negative no.

#666