侕嶯偟偺妝墍侕
[
偙偙偵搳峞][
壓]
1 巓傪第傕悢妛偺栤戣弌偡傢傑偢丄
(x-a)(x-b)=x^2-(a+b)x+ab
傒偨偄偵擇忔偼^2偺傛偆偵昞婰偟偰偹 第偑尒傗偡偄偐傜
偱偼栤戣
(x-a)(x-b)(x-c)乧乧(x-z)
偙傟傪揥奐偟偰傒
(i)
24 陮仧eyyy僪儃儞倵倵倵
(EZ)
25 巓傪崱擔堦斣抪偢偐偟偄
(i)
26 拵働儔http://bbmf.jp/menue/cache/img/jpg/w320_h320/m_773818_8c63dd373f701446d0627d86cb45622f7e0de9c9_jpg.jpg(EZ)
27 拵働儔俹亜侽偲偡傞丅
倃偺曽掱幃係倃^俀亄俀乮侾亅俹乯倃亅俹亖侽偺夝偑丄徊輧苼A夯草兤乮侽亝兤亙俀兾乯偱偁傞偲偒丄俹偺抣偲兤偺抣傪媮傔側偝偄丅
兤亖偟偄偨
(i)
28 巓傪>>27偳偆尒偰傕晛捠偺栤戣乧
(i)
29 拵働儔4X^2+2(1-P)X-P=0
sin兤+cos兤=(P-1)/2乧嘆丂
sin兤cos兤=-P/4乧嘇
(sin兤+cos兤)^2
=sin^2兤+2sin兤cos兤+cos^2兤
=1+2sin兤cos兤
=1-P/2
嘆傪戙擖
(sin兤+cos兤)^2=(P-1)^2/4=1-P/2
佁(P-1)^2=4-2P
佁P^2-2P+1=4-2P
佁P^2=3
P=併3乮P>0傛傝)
嘇偵戙擖偟偰
sin兤cos兤=-併3/4
(1/2)sin2兤=-併3/4乮2sin兤cos兤=sin2兤傛傝)
sin2兤=-併3/2
偙偙偱0亝兤<2兾傛傝
2兤=(4/3)兾,(5/3)兾
兤=(2/3)兾,(5/6)兾
偐側丠
(i)
30 旲悈宯抝巕仧Zk0k偝偄傫偙偝偄傫偨傫偠偉傫偲偐
(EZ)
31 仧Chan悢嘨悢B傑偱傗偭偰暥宯峴偭偨幰偑捠傝傑偡傛
(S)
32 撨桼懡仧chaX崅俀偱悢嘦悢俛傗偭偨
(i)
仭娙堈搳峞
[
曉怣][
嵟怴][
忋]
[
堦棗偵栠傞]
[
怴拝儗僗傪捠抦]