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Mathematics · Indices, logarithms and surds

MathematicsIndices, logarithms and surdsJAMB

Given log 2 = 0.3010 and log 5 = 0.6990, find log 0.4.

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Answer: D. −0.3980

log 0.4 = log(2/5) = 0.3010 − 0.6990 = −0.3980.

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