請問依兩題點做，如果得的話,可5可以寫埋點做?
回答 (1)
2015-09-10 10:59 am
1) m=1/2 n=1
(4m-n)/(3m+2n)
=(4x0.5-1)/(3x0.5+2x1)
=(2-1)/(1.5+2)
=1/3.5
=2/7
2)2X^2-5X+7,X=5
=2x5^2-5x5+7
=2x25-25+7
=32
(4m-n)/(3m+2n)
=(4x0.5-1)/(3x0.5+2x1)
=(2-1)/(1.5+2)
=1/3.5
=2/7
2)2X^2-5X+7,X=5
=2x5^2-5x5+7
=2x25-25+7
=32
收錄日期: 2021-04-18 00:11:45
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150910015354AAL7pGM