2^log4底12减3^log9底27加5^log25底1/3的值
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2^log4底12减3^log9底27加5^log25底1/3的值
2^log4底12减3^log9底27加5^log25底1/3的值
2^log4底12减3^log9底27加5^log25底1/3的值
我也在做这个,做出来是-44/3 (该死的预习作业啊!)
原式=2^log2为底12-3^log3为底27+5^log5为底1/3
=12 -27 +1/3
不知道对不对,因为只在书上看来了换底公式...理解无能啊,童鞋你要是知道答案了吱一声~
有点分不清你说的哪个是底数了,如果“底”后面是底数的话
可以在EXCEL单元格里写上
=2^(log(4,12))-3^(log(9,27))+5^(log(25,1/3))
=-0.599018621118002
如果“底”前面是底数的话就写
=2^(log(12,4))-3^(log(27,9))+5^(log(1/3,25))
=-1.15470053837925
2^log4底12减3^log9底27加5^log25底1/3的值
log4(3)*log9(2)+log2(4倍根号下64) log9(32)*log64(2log4(3)*log9(2)+log2(4倍根号下64) log9(32)*log64(27)+log9(2)*log4(根27)
2^(log4^12)-3^(log9^27)+5^(log25^1/3)等于多少?
1把loga^b表示成以b为底的对数2把loga^nb^n表示成以a为底的对数计算 log4^32 log9^8 * lg32^27log4^27/log4^3 (log4^3+log8^3)(log3^2+log9^2)
(log4-3+log8-3)(log3-2+log9-2)补充说明一下,log4-3就是以4为底3的对数一定一定要写清楚过程!
(1)log4 27乘以log25 8乘以log9 5 (2)(log4 3+log8 3)(log3 2+log9 2)、
利用对数的换底公式化简(log4 3+log8 3)(log3 2+log9 2)
利用对数的换底公式化简下列式子(log4 3+log8 3)(log3 2+log9 2)
计算log4(3)*log9(32)
计算:(1/4)^log4^1/3-lg25-lg4-log9^27
log2^根号下2+log9^27+4^(log4^13)
log2 根号2+log9 27+4^log4 13=?
(log3 2+log9 2)*(log4 3+log8 3)求值
化简(log4(3)+log8(3))(log3(2)+log9(2))
(log3^2 + log9^4)×(log4^3 + log8^3)
计算log9(根号2)*[log4(3)+log8(3)]
计算:(log4 3+log8 3)×log9 √2=?
求值:(log4^ 3+log8 ^9)*(log3^ 2+log9 ^16)