log3(x^2-5)
解不等式(2+log3 x)log3 x>log3 (9x)
(log2^3 +log3^5) x ( log3^5 +log9^5 ) x lg 2 ,
解不等式log3(x-2)+|log3(5-x)|小于2
log2(3)+log3(5)+log3(2)=?
解不等式:log3^(5+x)+log3^(x-1)≤3
由换底公式怎么得到log9(x+5)=log3[2(x+5)]=1/2log3(x+5)
关于对数函数log3 (x^2+2)=log3 x+1以log3为底
log3(2),log3(2^x-1),log3(2^x+11)成等差数列,则x的值为
log3 5-log3 15+1/2log9 27 的值
log 243÷log9 =log3^5÷log3^2 =log3^5-log3^2 然后怎么写
一道对数计算,log3(27/5)+log3(2/3)-log3(6/5)
解关于不等式log3[(1+x)/(1-x)]>log3[2(x+1)]