求log(2)( x+1) -1/2 log(2)(3x + 1) =0的根
问题描述:
求log(2)( x+1) -1/2 log(2)(3x + 1) =0的根
答
log(2)( x+1) =1/2 log(2)(3x + 1)
log(2)( x+1) = log(2)√(3x + 1)
x+1=√(3x + 1)
x^2+2x+1=3x+1
得x=0或x=1