計數機倍數問題....

2010-07-04 11:10 pm

請問用計數機可唔可以得知倍數???

eg: 2^5 = 32 >>>>我想知既係用計數機可唔可以搵到2既五次方=32??

我而家都會慢慢咁乘上去搵答案..我覺得好麻煩有冇方法係計算機到快d搵到答案?
我用既計數機係 sharp el-509wm

更新1:

XY=正方姐係咩???點禁係計數機到???

回答 (3)

2010-07-05 8:34 pm

✔ 最佳答案

用F5教過既公色搵
用 2^5 = 32 做例子

2^x = 32

log2^x = log32
xlog2 = log32
x = log32/log2

搵到

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2010-07-05 10:51 am

學過log未?

2^x = 32
x log 2 = log 32
x = log32 / log 2
x = 5

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2010-07-05 12:58 am

可以,Xy=次方
保正ok

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