log(2)9×log(3)4
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log(2)9×log(3)4log(2)9×log(3)4log(2)9×log(3)4log(2)9=2log(2)3log(3)4=2log(3)2=》4log(2)3*log(3)2=>4*(
log(2)9×log(3)4
log(2)9×log(3)4
log(2)9×log(3)4
log(2)9 = 2log(2)3
log(3)4= 2log(3)2
=》4log(2)3 *log(3)2
=> 4* (log(2)3*(1/(log(2)3)) )=4
//由换底公式 log(a)(b)=log(b)(b)/log(b)(a) ----取以b为底的对数,log(b)(b)=1 =1/log(b)(a)
=log(2)4*log(3)9=2*2=4
=lg9/lg2×lg4/lg3
=2lg3/lg2×2lg2/lg3
=4
6
=(lg9/lg2) * (lg4/lg3)= (lg3^2/lg2) * (lg2^2/lg3)=(2lg3/lg2) * (2lg2/lg3)=2*2=4
注:3^2代表3的2次方
62013年9月17日15时26分9秒
log(2)9log(3)4等于
log(2)9×log(3)4
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