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浠ｅ嚑缁煎悎棰橈紙浠ヤ唬鏁颁负涓荤殑缁煎悎锛?/p>
鍒嗗眰缁冧範
A
妗ｏ紙宸╁浐涓撶粌锛?/p>
1
锛庡鍥撅紝鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴
xOy
涓紝鎶涚墿绾?/p>
y
=
ax
2
+
bx
+4
涓?/p>
x
杞翠氦浜庣偣
A
(
锛?/p>
2
锛?/p>
0)
銆?/p>
B
(6
锛?/p>
0)
锛屼笌
y
杞翠氦浜庣偣
C
锛岀洿绾?/p>
CD
鈭?/p>
x
杞达紝涓斾笌鎶涚墿绾夸氦浜庣偣
D
锛?/p>
P
鏄姏鐗╃嚎涓婁竴鍔?/p>
鐐癸紟
锛?/p>
1
锛夋眰鎶涚墿绾跨殑瑙ｆ瀽寮忥紱
锛?/p>
2
锛夎繃鐐?/p>
P
浣?/p>
PQ
鈯?/p>
CD
浜庣偣
Q
锛屽皢鈻?/p>
CPQ
缁曠偣
C
椤烘椂閽堟棆杞紝鏃嬭浆瑙掍负
伪
锛?/p>
0
潞锕?/p>
伪
锕?/p>
90
潞锛夛紝
褰?/p>
cos
伪
=
3
5
锛屼笖鏃嬭浆鍚庣偣
P
鐨勫搴旂偣
'
P
鎭板ソ钀藉湪
x
杞翠笂鏃讹紝姹傜偣
P
鐨勫潗鏍囷紟
2
锛庡凡鐭ワ細濡傚浘锛屽湪骞抽潰鐩磋鍧愭爣绯?/p>
xOy
涓紝鍥涜竟褰?/p>
ABCD
鏄彵褰紝椤剁偣
A
锛?/p>
C
锛?/p>
D
鍧囧湪鍧愭爣杞?/p>
涓婏紝涓?/p>
AB=5
锛?/p>
sinB=
4
5
锛?/p>
锛?/p>
1
锛夋眰杩?/p>
A
锛?/p>
C
锛?/p>
D
涓夌偣鐨勬姏鐗╃嚎鐨勮В鏋愬紡锛?/p>
锛?/p>
2
锛夎鐩寸嚎
AB
鐨勮В鏋愬紡涓?/p>
y
1
=mx+n
锛?/p>
锛?/p>
1
锛変腑鎶涚墿绾跨殑瑙ｆ瀽寮忎负
y
2
=ax
2
+bx+c
锛屾眰褰?/p>
y
1
锛?/p>
y
2
鏃讹紝鑷彉閲?/p>
x
鐨勫彇鍊艰寖鍥达紱
锛?/p>
3
锛夎鐩寸嚎
AB
涓庯紙
1
锛変腑鎶涚墿绾跨殑鍙︿竴涓氦鐐逛负
E
锛?/p>
P
鐐逛负鎶涚墿绾夸笂
A
銆?/p>
E
涓ょ偣涔嬮棿鐨勪竴涓姩
鐐癸紝褰?/p>
P
鐐瑰湪浣曞鏃讹紝鈻?/p>
PAE
鐨勯潰绉渶澶э紵骞舵眰鍑洪潰绉殑鏈�澶у�硷紟
3
锛?/p>
宸?/p>
鐭?/p>
鎶?/p>
鐗?/p>
绾?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
2
2
-
4
3
-
2
-
3
m
m
x
m
x
m
y
飥?/p>
飥?/p>
飥?/p>
鐨?/p>
鏈�
浣?/p>
鐐?/p>
A
鐨?/p>
绾?/p>
鍧?/p>
鏍?/p>
鏄?/p>
3
锛?/p>
鐩?/p>
绾?
b
mx
y
飥?/p>
飥?/p>
缁忚繃鐐?/p>
A
锛屼笌
y
杞翠氦浜庣偣
B
锛屼笌
x
杞翠氦浜庣偣
C.
锛?/p>
1
锛夋眰鎶涚墿绾夸笌鐩寸嚎
AB
鐨勮В鏋愬紡
.
锛?/p>
2
锛?/p>
灏嗙洿绾?/p>
AB
缁曠偣
O
椤烘椂閽堟棆杞?/p>
90
掳锛?/p>
涓?/p>
x
杞翠氦浜庣偣
D
锛?/p>
涓?/p>
y
杞翠氦浜庣偣
E
锛?/p>
姹?/p>
sin
鈭?/p>
BDE
鐨勫�?/p>
.
锛?/p>
3
锛夎繃
B
鐐逛綔
x
杞寸殑骞宠绾?/p>
BG,
鐐?/p>
M
鍦ㄧ洿绾?/p>
BG
涓婏紝涓斿埌鎶涚墿绾跨殑瀵圭О杞寸殑璺濈涓?/p>
6
锛岃鐐?/p>
N
鍦ㄧ洿绾?/p>
BG
涓婏紝璇蜂綘鐩存帴鍐欏嚭浣垮緱鈭?/p>
AMB+
鈭?/p>
ANB=45
0
鐨勭偣
N
鐨勫潗鏍?/p>
.