更新1:
X =a+1是怎麼來的😶
數學 求原函數 f(x-1)=2x+3 求 f(a)=? f(x)=?
回答 (2)
2017-12-26 10:07 pm
X =a+1是怎麼來的😶
設a=x-1
所以a+1=x
f(x-1)=f(a)=2(a+1)+3
f(a)=2a+5
f(x)=2x+5
設a=x-1
所以a+1=x
f(x-1)=f(a)=2(a+1)+3
f(a)=2a+5
f(x)=2x+5
2017-12-24 2:17 pm
f(x-1)=2x+3
x=a+1 代入
f(a+1-1)=2(a+1)+3
f(a)=2a+5
f(x)=2x+5
x=a+1 代入
f(a+1-1)=2(a+1)+3
f(a)=2a+5
f(x)=2x+5
收錄日期: 2021-04-24 00:51:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20171224060919AAXqHpA