lg8*log2(5)*log5(4)得多少?

计算：（lg2)2+3lg5+lg5(1+lg2)+lg8+log2（5）log5（4) (Log2)的三次方+(Log5)的三次方+lg8*lg5 log2 5乘log5 4等于多少 log2(5)*log5(8)化简 log2 5*log5 81*log3 4+ln根号e log2 25*log3 4 *log5 9 数学(log5 √2*log7 9)/(log5 1/3 *log7 3√4)+log2( √(3+√5)- log√( (log3^4+log5^2)(log2^9+log2^根号3) 计算log2 6-log2 3,lg5+lg2,log5 3+log5 1/3,log3 5-log3 15 运用对数换底公式化简log2(3)*log3(4)*log4(5)*log5(2), 帮忙换底化简下列:logaC*logcA .log2 3 * log3 4 * log4 5 * log5 2 log2(3)*log3(4)*log4(5)*log5(6)*log6(7)*log7(8)=?