一道复数与对数结合题
问题描述:
一道复数与对数结合题
设z=log2(m^2-3m-3)+i*log2(m-3)(m为R),若Z 对应的点在直线x-2y+1=0上,则m的值是多少
答
点就是(log2 (m²-3m-3),log2 (m-3))先求定义域m²-3m-3>0且m-3>0,解得m>(3+√21)/2依题意得log2 (m²-3m-3)-2log2 (m-3)+1=0,即log2 (m²-3m-3)+1=2log2 (m-3),亦即2(m²-3m-3)=(m-3)²...