求 log5(35)+ 2log0.5(根号2)-log3(1/27)-log3(1/15)-log5(21)

问题描述:

求 log5(35)+ 2log0.5(根号2)-log3(1/27)-log3(1/15)-log5(21)

log5(35)+log0.5(2)-(-log3(27))-(-log3(15))-log5(21)=log5(35/21)-log2(2)+log3(15*27)=log5(5/3)-1+log3(3^4*5)=log5(5)-log5(3)-1+4+log3(5)=log3(5)-log5(3)=ln5/ln3-ln3/ln5+4我不记得让被那些自然对数值了,不...