Logarithms Practice Test 2

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Question : 15 of 39

Marks: +1, -0

If

a^2 + b^2 = 2ab

, then

log (a - b)^ 2

is equal to:

0
1
4
Undefined
None of these

Solution:

a^2+b^2=2ab

a^2+b^2-2ab=0

(a-b)^2=0

Taking log on both sides,

\log(a-b)^2=\log 0

= Undefined

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