Question

please give answer ......
only Q7

Answer 1

As the equation has equal and real roots :-
Discriminant = 0

b2 - 4ac = 0

kx2-2√5x+4 = 0
(2√5)2 - 4(k)(4) = 0
4×5 = 16k
20 = 16k
k = 20/16
k = 10/8 = 5/4

Hence the required answer is 5/4

Hope this helps!!
cheers!! (:

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