高中对数计算题
计算 [(Lg4-Lg60)/(Lg3+Lg5)]^3-(4^5)*[2^(-11)]
人气:261 ℃ 时间:2020-01-31 21:55:47
解答
(Lg4-Lg60)/(Lg3+Lg5)
=Lg(4/60)/Lg(3*5)
=Lg(1/15)/Lg15
=Lg15^(-1)/Lg15
=-Lg15/Lg15
=-1
(4^5)*[2^(-11)]
=(2^2)^5*2^(-11)
=2^(2*5-11)
=2^(-1)
=1/2
所以[(Lg4-Lg60)/(Lg3+Lg5)]^3-(4^5)*[2^(-11)]
=(-1)^3-1/2
=-1-1/2
=-3/2
推荐
猜你喜欢
- 因式分解:4a²bc-6ab+32b² (x²+x)²-8(x²+x)+12
- A:Peter is never late for school,__ he?B:___.He always comes on time.(A)is;Yes (B)is;No
- 一首鼓励人奋进的古诗
- (Everyone ,you ,here ,Looking ,is ,for ,there ,and.)用这些英语单词来连词成句
- 有一张厚为0.1mm,假设可以一直对折,请问:对折以后的厚度能否超过珠穆朗玛峰的高度8844?若能
- A; what's the capital of china B; ( ),it's beautiful,too.
- 已知c>2,设命题p:x²+4x+c=0无实根命题q:不等式2x-c>1的解集包含{x|x≥3}
- 发音以元音开头的字母有哪些a e i o u m