Use app×
QUIZARD
QUIZARD
JEE MAIN 2026 Crash Course
NEET 2026 Crash Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
320 views
in Logarithm by (81.1k points)
closed by
Solve`(log_(3)x)(log_(5)9)- log_x 25 + log_(3) 2 = log_(3) 54`.

1 Answer

0 votes
by (80.8k points)
selected by
 
Best answer
Correct Answer - ` x = 1/sqrt5, 25`
`(log_(3)x)(log_(5)9)-log_(x) 25+log_(3)2=log_(3) 54`
` or (logx)/(log 3) xx(log 9)/(log 5) - 2 log_(x) 5 +log_(3)2 =3+ log_(3)2`
` or 2 log _(5) x - 2log_(x) 5 +log_(3) 2 = 3 + log_(3) 2`
` or 2 t^(2) - 2 = 3t" "("putting "log_(5) x =t)`
` or 2t^(2) - 3t - 2 = 0`
` or (2t+1)(t-2) =0`
` rArr t =- 1//2 or t = 2`
` rArr log_(5)x =- 1//2 or log_(5) x = 2`
` rArr x = 1//sqrt5, x = 25`

Related questions

0 votes
1 answer
0 votes
1 answer
0 votes
1 answer
asked Oct 1, 2019 in Logarithm by Deshna (81.1k points)

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

...