RRB Group D 17-Dec-2018 Shift 1 Soled Paper

Question : 21 of 100

Marks: +1, -0

x^2+kx+7.5k=0

has no (real) solution, then the value of k will satisfy:

Solution:

For no real solution condition in

ax^2+bx+c=0

b^2-4ac<0

k^2-4×7.5k<0

k(k-30)<0

$⇒0

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