(log5 根号2 ×log7 9)\(log5 1\3×log7 4开3次方)

(log5根号2*log49 81)/(log25 1/3*log7 4开3次方）=? 数学(log5 √2*log7 9)/(log5 1/3 *log7 3√4)+log2( √(3+√5)- log√( (log5根号2*log49^81)/(log25^(1/3)*log7^立方根4) （log5根号2底乘以log根号7底3 ）/log根号5底3分之1乘以log7底4的立方根 求值 3^2-log3(2)= log7(log5(log2(32)))=? log2(3)*log3(4)*log4(5)*log5(6)*log6(7)*log7(8)=? log2(3)+log3(4)+log4(5)+log5(6)+log6(7)+log7(8) 求下列函数的定义域 y=log5(1-x) y=1/log2x y=log7乘以1/1-3x y=根号下log3x 我是这样做的log2(3)*log3(5)*log5(49)*log7(64)=log2(3)*log3(5)*2log log7(log5(log3|x|)))=0 能不能再详细一点,比如说log7怎么等于1还有log5怎么等于5的呢? 数学指数函数问题麻烦解释下y=log5(x+1) y=1/(log2(底数)X) y=log7(底数)1/(1-3x) log2为底3*log3为底4*log4为底5log5底6*log6底7*log7底8=