用平方程不等式log3(X+2)>log3(3X+1)
问题描述:
用平方程不等式log3(X+2)>log3(3X+1)
答
log3(X+2)>log3(3X+1)
x+2>3x+1 =>x0 =>x>-2
3x+1>0 =>x>-1/3
-1/3