(√a-√b分之√b+a-b分之√a)乘以√a+√b分之a+2√ab+b)除以(√a+√b)
问题描述:
(√a-√b分之√b+a-b分之√a)乘以√a+√b分之a+2√ab+b)除以(√a+√b)
计算啊
答
原式=[√b/(√a-√b)+(√a)/(a-b)]×[(a+2√ab+b)/(√a+√b)]÷(√a+√b)
={ √b×(√a+√b)/[(√a+√b)(√a-√b)]+(√a)/(a-b) }×[(√a+√b)²/(√a+√b)]×[1/(√a+√b)]
=(√b×√a+√b×√b)/(a-b)+(√a)/(a-b)]
=(√ab+b+√a)/(a-b)