Engineering
Mathematics
Properties of Logarithm
Question

Which of the following statement is true?

logsecπ30.8¯>1

log2(8)  <  log3(9)

21/2 < 31/3

 log4(3) <  log20(9)

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Solution

(1)     log43 < 2 log203   ⇒   log43 < 2log320  log420 < 2   ⇒  2 < log420 < 3  ⇒   False.
(2)     log20.8¯  > 1    (False)
(3)    log21/223<log31/232
        6 < 4     (False)
(4)    21/2<31/3
        23 < 32