if one root of equation (l-m)x^2+lx+1=0 be double of the other and if l be real , then find maximum possible value of m
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Step-by-step explanation:
The sum of roots is (l−m)−l=3r,
The product of roots is (l−m)1=2r2 where r is one of the roots.
So, 2(l−m)1=9(l−m)2l2
9(l−m)=2l2
2l2−9l+9m=0
For l to real, the discriminant is non−negative.
81≥8×9m
m≤89.
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