If f(x)=5^2x+1,find the value of {f(5+2x)}{f(5-2x)].
ans.:5^22
請列式教我計 =口=" thank you~~
F.4Mathsx1
2009-06-10 2:32 am
回答 (1)
2009-06-10 3:19 am
✔ 最佳答案
[f(5+2x)][f(5-2x)]=[52(5+2x)+1][52(5-2x)+1]=[5(10+4x)+1][5(10-4x)+1]
=(54x+11)(5-4x+11)
=5[(4x+11)+(-4x+11)]
=522
收錄日期: 2021-04-23 20:38:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090609000051KK01271