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ব্যাংক স্পেশাল
Quantitative Aptitude
Power & Logarithm
Subject
Quantitative Aptitude
Topic
Power & Logarithm
If log a/b + log b/a = log (a + b), then:
Reading
ক)
a + b = 1
খ)
a - b = 1
গ)
a = b
ঘ)
a2 - b2 = 1
Explanation
Log a/b + log b/a = log (a + b) => log (a + b) = log (a/b x b/a) = log 1. So, a + b = 1.
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