Question

If a, b are root of ax square+ bx+ b= 0,then root a ÷ b+ root b÷ a+ root b÷a is​

Answer 1

ax

2

−bx+1=0hasimaginaryroots

∴D<0

b

2

−4a<0

b

2

<4a

leb

2

<4a

∴a>0

∴f(x)>0for∀x∈R

∴f(−1)=a+b+1>0