請問一下有關數學多項式的問題?:Realtime－線上遊戲排行榜2013/2014,進擊的巨人線上看,candy crush saga外掛,正妹寫真三圍

Blogtrottr

Yahoo!奇摩知識+ - 分類問答 - 科學常識 - 已解決

Dog-Lovers' Tees.

Unleash yourself and shop our special collection of tees and accessories for you and your pooch.

From our sponsors

Jul 31st 2014, 09:32

設f(x)=x^4+ax^2+bx+2被(x－1)^2整除，則2a+3b=?
Sol
f(x)=x^4+ax^2+bx+2
f’(x)=4x^3+2ax+b
f(1)=1+a+b+2=0
f’(1)=4+2a+b=0
(4+2a+b)－(1+a+b+2)=0
a=－1，b=－2
or
　　　　　　　　ｘ２＋２ｘ＋２
　　　　　　　─────────────────
ｘ２－２ｘ＋１）ｘ４＋ａｘ２＋ｂｘ＋２
　　　　　　　）ｘ４－２ｘ３＋ｘ２
　　　　　　　）────────────────
　　　　　　　）２ｘ３＋（ａ－１）ｘ２＋ｂｘ＋２
　　　　　　　）２ｘ３－４ｘ２＋２ｘ
　　　　　　　）────────────────
　　　　　　　）（ａ＋３）ｘ２＋（ｂ－２）ｘ＋２
　　　　　　　）　　　２ｘ２－　　　　４ｘ＋２
　　　　　　　）────────────────
　　　　　　　）０
So
a=－1，b=－2

This entry passed through the Full-Text RSS service — if this is your content and you're reading it on someone else's site, please read the FAQ at fivefilters.org/content-only/faq.php#publishers.

You are receiving this email because you subscribed to this feed at blogtrottr.com.

If you no longer wish to receive these emails, you can unsubscribe from this feed, or manage all your subscriptions