log9(45)-log9(5)

log9(45)-log9(5) log9×log4 log4^27×log(8)25×log9^5 log4^27×log(8)25×log9^5 log3(x-1)=log9(x+5) 中log9(x+5) 怎么化简? log3(x-1)=log9(x+5) 中log9(x+5) 怎么化简? 已知log9 5=a,log9 7=b,求log35 9的值在线等 log9(x-5)+log9(x=+3)=1 9是那个log的底 log9 3+log9 27=怎么求~ 计算3^log9(64) 怎们算log9 27? log3*2/log9*4 log9^27= log9 27等于多少 log9等于什么 log9 9等于几? log9 81=? 计算(log5^3+log25^3)(log9^5+log27^5)