绗?/p>
1
椤?/p>
鍏?/p>
12
椤?/p>
浜屾鍑芥暟缁煎悎棰樺瀷绮捐绮剧粌
棰樺瀷涓�锛氫簩娆″嚱鏁颁腑鐨勬渶鍊奸棶棰?/p>
渚?/p>
1
锛氬鍥撅紝鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴涓紝鎶涚墿绾?/p>
y=ax
2
+bx+c
缁忚繃
A
锛堬梗
2
锛岋梗
4
锛?/p>
锛?/p>
O
锛?/p>
0
锛?/p>
0
锛?/p>
锛?/p>
B
锛?/p>
2
锛?/p>
0
锛変笁
鐐癸紟
锛?/p>
1
锛夋眰鎶涚墿绾?/p>
y=ax
2
+bx+c
鐨勮В鏋愬紡锛?/p>
锛?/p>
2
锛夎嫢鐐?/p>
M
鏄鎶涚墿绾垮绉拌酱涓婄殑涓�鐐癸紝姹?/p>
AM+OM
鐨勬渶灏忓�硷紟
瑙ｆ瀽锛?/p>
锛?/p>
1
锛夋妸
A
锛堬梗
2
锛岋梗
4
锛?/p>
锛?/p>
O
锛?/p>
0
锛?/p>
0
锛?/p>
锛?/p>
B
锛?/p>
2
锛?/p>
0
锛変笁鐐圭殑鍧愭爣浠ｅ叆
y=ax
2
+bx+c
涓紝寰?/p>
瑙ｈ繖涓柟绋嬬粍锛屽緱
a=
锕?/p>
锛?/p>
b=1
锛?/p>
c=0
鎵�浠ヨВ鏋愬紡涓?/p>
y=
锕?/p>
x
2
+x
锛?/p>
锛?/p>
2
锛夌敱
y=
锕?/p>
x
2
+x=
锕?/p>
锛?/p>
x
锕?/p>
1
锛?/p>
2
+
锛屽彲寰?/p>
鎶涚墿绾跨殑瀵圭О杞翠负
x=1
锛屽苟涓斿绉拌酱鍨傜洿骞冲垎绾挎
OB
鈭?/p>
OM=BM
鈭?/p>
OM+AM=BM+AM
杩炴帴
AB
浜ょ洿绾?/p>
x=1
浜?/p>
M
鐐癸紝鍒欐鏃?/p>
OM+AM
鏈�灏?/p>
杩囩偣
A
浣?/p>
AN
鈯?/p>
x
杞翠簬鐐?/p>
N
锛?/p>
鍦?/p>
Rt
鈻?/p>
ABN
涓紝
AB=
=
=4
锛?/p>
鍥犳
OM+AM
鏈�灏忓�间负
锛?/p>
鏂规硶鎻愮偧锛氬凡鐭ヤ竴鏉＄洿绾夸笂涓�鍔ㄧ偣
M
鍜岀洿绾垮悓渚т袱涓浐瀹氱偣
A
銆?/p>
B
锛屾眰
AM+BM
鏈�灏忓�肩殑闂锛屾垜浠彧
闇�鍋氬嚭鐐?/p>
A
鍏充簬杩欐潯鐩寸嚎鐨勫绉扮偣
A
鈥?/p>
锛?/p>
灏嗙偣
B
涓?/p>
A
鈥?/p>
杩炴帴璧锋潵浜ょ洿绾夸笌鐐?/p>
M
锛?/p>
閭ｄ箞
A
鈥?/p>
B
灏辨槸
AM+BM
鐨勬渶灏忓�笺�?/p>
鍚岀悊锛?/p>
鎴戜滑涔熷彲浠ュ仛鍑虹偣
B
鍏充簬杩欐潯鐩寸嚎鐨勫绉扮偣
B
鈥?/p>
锛?/p>
灏嗙偣
A
涓?/p>
B
鈥?/p>
杩炴帴璧锋潵浜ょ洿绾夸笌鐐?/p>
M
锛?/p>
閭ｄ箞
AB
鈥欏氨鏄?/p>
AM+BM
鐨勬渶灏忓�笺�傚簲鐢ㄧ殑瀹氱悊鏄細涓ょ偣涔嬮棿绾挎鏈�鐭�?/p>
A
A
B
B
M
鎴栬�?/p>
M
A
鈥?/p>
B
鈥?/p>
渚?/p>
2
锛氬凡鐭ユ姏鐗╃嚎
1
C
鐨勫嚱鏁拌В鏋愬紡涓?/p>
2
3
(
0)
y
ax
bx
a
b
飥?/p>
飥?/p>
飥?/p>
飥?/p>
锛岃嫢鎶涚墿绾?/p>
1
C
缁忚繃鐐?/p>
(0,
3)
飥?/p>
锛屾柟绋?
2
3
0
ax
bx
a
飥?/p>
飥?/p>
飥?/p>
鐨勪袱鏍逛负
1
x
锛?/p>
2
x
锛屼笖
1
2
4
x
x
飥?/p>
飥?/p>
銆?/p>
锛?/p>
1
锛夋眰鎶涚墿绾?/p>
1
C
鐨勯《鐐瑰潗鏍?/p>
.
锛?/p>
2
锛夊凡鐭ュ疄鏁?/p>
0
x
飥?/p>
锛岃璇佹槑锛?/p>
1
x
x
飥?
鈮?/p>
2
,
骞惰鏄?/p>
x
涓轰綍鍊兼椂鎵嶄細鏈?/p>
1
2
x
x
飥?/p>
飥?/p>
.
锛?/p>
3
锛?/p>
鑻ユ姏鐗╃嚎鍏堝悜涓婂钩绉?/p>
4
涓崟浣嶏紝
鍐嶅悜宸﹀钩绉?/p>
1
涓崟浣嶅悗寰楀埌鎶涚墿绾?/p>
2
C
锛?/p>
璁?/p>
1
(
,
)
A
m
y
锛?/p>
2
(
,
)
B
n
y
鏄?/p>
2
C
涓婄殑涓や釜涓嶅悓鐐癸紝
涓旀弧瓒筹細
0
90
AOB
飪?/p>
飥?/p>
锛?/p>
0
m
飥?/p>
锛?/p>
0
n
飥?/p>
璇蜂綘鐢ㄥ惈鏈?/p>
m
鐨勮〃杈惧紡琛ㄧず鍑衡柍
AOB
鐨勯潰绉?/p>
S
锛?/p>
骞舵眰鍑?/p>
S
鐨勬渶灏忓�煎強
S
鍙栨渶灏忓�兼椂涓�娆″嚱鏁?/p>
OA
鐨勫嚱鏁拌В鏋愬紡銆?/p>