The real solutions of the equation 2x+2⋅56−x=10x2 is/are
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
1
b
2
c
−log10(250)
d
log104−3
answer is B.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
2x+2⋅56−x=2x2⋅5x2or 56−x−x2=2x2−x−2or 6−x−x2log105=x2−x−2log102( base 10) or 6−x−x21−log102=x2−x−2log102or 6−x−x2=log102x2−x−2−x2−x+6or 6−x−x2=log102[4−2x]or x2+x−6=2log102(x−2)or (x+3)(x−2)=log104(x−2)Therefore, either x=2 or x+3=log104⇒ x=log104−3=log1041000⇒ x=−log10(250)