Exponential & Logarithm MCQs

Mathematics → Exponential & Logarithm MCQs

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7. $log4+log25=?$
(A) 2
(B) 3
(C) 4
(D) 5

8. What is the value of x in the logarithmic equation

(A) 2
(B) 3
(C) 4
(D) 5

9. What is the value of x in the exponential equation

(A) 2
(B) 3
(C) 4
(D) 5

ANSWERS: EXPONENTIAL & LOGARITHM MCQS
6. D
7. A
8. C
9. A
10. D

SOLUTIONS: EXPONENTIAL & LOGARITHM MCQS

First, we know that $loga+logb=logab$ . Then, log1 = 0 (that is, 10⁰ = 1), log10 = 1 (that is, 10¹ = 10), log100 = 2 (that is, 10² = 100) and so on..

NOTE: log a – log b = log a/b