If the roots of the equation x2−2ax+a2+a−3=0 are real and less than 3, then
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
a<2
b
2≤a≤3
c
3
d
a>4
answer is A.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
Given equation is x2−2ax+a2+a−3=0 If roots are real, then D≥0 ⇒4a2−4(a2+a−3)≥0⇒−a+3≥0 ⇒a−3≤0⇒a≤3As roots are less than 3, hence f(3)>0 9−6a+a2+a−3>0⇒a2−5a+6>0 ⇒(a−2)(a−3)>0⇒either a<2 or a>3Hence a<2 satisfy all.