Question

if λ^2+λ-2)x^2+(λ+2)x<1 for all x∈R then λ belongs to the interval

Answer 1

@hartnn PLS...HLP

Answer 2

(λ^2+λ-2)x^2+(λ+2)x<1
(λ^2+λ-2)x^2+(λ+2)x-1 < 0
looks like definite negative.

Answer 3

you need the intersection of :
(1) a < 0
(2) D < 0

Answer 4

yup, thats correct. @RadEn good!

Answer 5

yes man @RadEn is right

Answer 6

thanks...that was a real hlp from ur side