已知√a(√a+√b)=3√b乘以(2/3乘以√a+4√b),其中ab≠0,求(a-√3ab)/(a+√3ab)的值.
问题描述:
已知√a(√a+√b)=3√b乘以(2/3乘以√a+4√b),其中ab≠0,求(a-√3ab)/(a+√3ab)的值.
答
√a(√a+√b)=3√b×(2/3×√a+4√b)a+√(ab)=2√(ab)+12ba-√(ab)-12b=0(√a-4√b)(√a+3√b)=0√a=4√b (a-√3ab)/(a+√3ab)=(√a+√3√b)/(√a-√3√b)=(4√b+√3√b)/(4√b-√3√b)=(19+8√3)/13...