1/a+1/b=4,求4a+3ab+4b/-3a+2ab-3b

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 15:44:37
1/a+1/b=4,求4a+3ab+4b/-3a+2ab-3b
x1 @E2q]&&EB S 6@l4JNM7.SDMB&0eKd.632~pgJJ2Ot1ʝ!1.byE:N|;{-vj/4ۺ\)t&w;NЌ Xv

1/a+1/b=4,求4a+3ab+4b/-3a+2ab-3b
1/a+1/b=4,求4a+3ab+4b/-3a+2ab-3b

1/a+1/b=4,求4a+3ab+4b/-3a+2ab-3b
1/a+1/b=(a+b)/ab=4
a+b=4ab
原式=[4(a+b)+3ab]/[-3(a+b)+2an]
=[4(4ab)+3ab]/[-3(4ab)+2ab]
=19ab/(-10ab)
=-19/10

1/a+1/b=4
通分下得 a+b=4ab
代人右边得
(4*4ab+3ab)/(-3*4ab+2ab)=-19/10