Q.
If the products of roots of the equation x2-3kx+2e2log k-1=0is 7, then its roots will real when
see full answer
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
k=1
b
k=2
c
k=3
d
None of these
answer is B.
(Unlock A.I Detailed Solution for FREE)
Ready to Test Your Skills?
Check your Performance Today with our Free Mock Test used by Toppers!
Take Free Test
Detailed Solution
Given equation can be written asx2-3kx+2k2-1=0So the product of roots is 2k2-1. But the product of roots is 7. Hence 2k2-1=7⇒2k2=8⇒k=±2But k cannot be negative.
Watch 3-min video & get full concept clarity