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標題:
若log2=a及log7=b,以a及b表log35?
發問:
若log2=a及log7=b,以a及b表log35? 是這樣做嗎? =log7+log5 =log7+log(2乘2.5) =log7+log2+log2.5 =b+a+log2.5
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最佳解答:
log 35 =log (7 x 5) =log7+log5 =log7+log 10/2 =log7+ log10- log2 (log 10 =1) = log7 +1 -log2 = 1+b-a =]?
其他解答:
log35 =log(7x5) =log7+log5 =b+log(10/2) =b+log10-log2 =b+1+a(這是答案)|||||=log(7*5) =log7+log5 =log7+log10/2 =log7+log10-log2 =log7+1-log2 =1+b-a
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