Q. 105.0( 1 Vote )

log108 + log105– log104 =
A. log109

B. log1036

C. 1

D. – 1

Answer :

Consider, log108 + log105– log104 = log10(8× 5) – log104

(since, logaM + logaN = loga(M× N) )

log108 + log105– log104 = log10(40) – log104

= log10(40 ÷ 4)

(since, logaM – logaN = loga(M÷N) )

log108 + log105– log104 = log10(10) = 1 (since, logaa = 1)

Thus, correct answer is (C)

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Foundation | Logarithms43 mins
Quiz on Irrational Numbers31 mins
Quiz | Irrational Numbers and its Operations45 mins
Introduction to Irrational Numbers50 mins
Converting Recurring Numbers in Rational Form48 mins
The Curious Case of Irrational Numbers43 mins
RD Sharma | Factorization of Algebraic Expression42 mins
Irrational numbers on Number line32 mins
Quiz | Conservation of Momentum33 mins
What is Impulse?44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses