2007-05-07 13:32:07 · 9 answers · asked by rohawks 1 in Science & Mathematics ➔ Mathematics
log(a) + log(b) = log(a*b)
So presumably the answer you are expected to give is log(7) + log(2) = log(7*2) = log(14).
log(14) = 1.146128 or so.
2007-05-07 13:35:50 · answer #1 · answered by McFate 7 · 0⤊ 0⤋
log 7 = 0.845
log 2 = 0.301
the sum = 1.14 6
The log of 7 = log of 2 is not equal to log 7 * log 2
as someone stated. When you add to logs it means you are adding the two logs of the original numbers to perform a multiplication. In this case if you take the antilog of 1.146 you well get 14 which is obviously 7 * 2.
2007-05-07 13:38:25 · answer #2 · answered by Anonymous · 0⤊ 0⤋
well rules of logs say.. if you are adding you are multiplying
which means
log 7 + log 2 = log 7 * log 2
since the bases are the same (10) you can put then under 1 log
i.e. Log 7*2 = Log 14 which is approximately 1.15 (3 sig figures)
2007-05-07 13:38:03 · answer #3 · answered by sudhi_kandi 3 · 0⤊ 0⤋
Property of of logs
log x + log y = log xy
log 7 + log 2 = log 14
2007-05-07 13:36:46 · answer #4 · answered by Anonymous · 0⤊ 0⤋
log7 + log2 = log(7)(2) = log14
2007-05-07 13:36:08 · answer #5 · answered by Scott2Hott 2 · 0⤊ 0⤋
Mult, log 14
2007-05-07 13:35:59 · answer #6 · answered by richardwptljc 6 · 0⤊ 0⤋
log7 + log2=log14==1.146. answer
2007-05-07 13:51:07 · answer #7 · answered by Anonymous · 0⤊ 0⤋
i am sure your computer has calculator.
2007-05-07 13:35:32 · answer #8 · answered by ۞_ʞɾ_ 6 · 0⤊ 0⤋
1.1461
2007-05-07 13:37:45 · answer #9 · answered by Anonymous · 0⤊ 0⤋