log3(5)+log9(5)求大神帮助
log3(5)+log9(5)求大神帮助
log3 5-log3 15+1/2log9 27 的值
log9^5=a,log3^7=b,求log35^9=?
log9(45)-log9(5)
log 243÷log9 =log3^5÷log3^2 =log3^5-log3^2 然后怎么写
(log2^3 +log3^5) x ( log3^5 +log9^5 ) x lg 2 ,
由换底公式怎么得到log9(x+5)=log3[2(x+5)]=1/2log3(x+5)
1.log2 3*log3 4*log4 5*log5 2 2.(log4 3+log8 3)8(log3 2+log9
(log4 3+log8 3)(log3 5+log9 5)(log5 2+log25 2)=
log9]5=m,log3]7=n.试用m,n表示log35】9
填空题:方程log3(x-1)=log9(x+5)的解是____________
若log9 5=a,log3 7=b,则log35 9=______.