鍙紪杈戣寖鏈?/p>
y
A
D
x
T
H
C
B
O
1
1
绗崄鍏浜屾鍑芥暟涓庡钩琛屽洓杈瑰舰缁煎悎
涓�銆佹暀瀛﹀唴瀹?/p>
1.
浜屾鍑芥暟鐨勮〃绀?/p>
,
浜屾鍑芥暟鍥惧儚涓庢�ц川锛?/p>
2.
骞宠鍥涜竟褰㈢殑鎬ц川鍜屽垽瀹氾紱
3.
鍑芥暟鍥惧儚涓庡钩琛屽洓杈瑰舰鐨勭患鍚堝簲鐢紝鍏稿瀷搴旂敤銆佸浘鍍忛锛?/p>
浜屻�?/p>
渚嬮缁嗙湅
銆愪緥
1
銆?/p>
宸茬煡锛氬鍥撅紝鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴
xOy
涓紝鐩寸嚎
3
6
4
y
x
飥?/p>
飥?/p>
飥?/p>
涓?/p>
x
杞淬�?/p>
y
杞寸殑浜ょ偣鍒?/p>
鍒负
A
B
銆?/p>
锛?
灏?/p>
OBA
飪?/p>
瀵规姌锛屼娇鐐?/p>
O
鐨勫搴旂偣
H
钀藉湪鐩寸嚎
AB
涓婏紝鎶樼棔浜?/p>
x
杞翠簬鐐?/p>
.
C
锛?/p>
1
锛夌洿鎺ュ啓鍑虹偣
C
鐨勫潗鏍囷紝骞舵眰杩?/p>
A
B
C
銆?/p>
銆?/p>
涓夌偣鐨勬姏鐗╃嚎鐨勮В鏋愬紡锛?/p>
锛?/p>
2
锛夎嫢鎶涚墿绾跨殑椤剁偣涓?/p>
D
锛屽湪鐩寸嚎
BC
涓婃槸鍚﹀瓨鍦ㄧ偣
P
锛屼娇寰楀洓杈瑰舰
ODAP
涓哄钩琛屽洓杈瑰舰锛熻嫢
瀛樺湪锛屾眰鍑虹偣
P
鐨勫潗鏍囷紱鑻ヤ笉瀛樺湪锛岃鏄庣悊鐢憋紱
锛?/p>
3
锛夎鎶涚墿绾跨殑瀵圭О杞翠笌鐩寸嚎
BC
鐨勪氦鐐逛负
T
Q
锛?
涓虹嚎娈?/p>
BT
涓婁竴鐐癸紝鐩存帴鍐欏嚭
QA
QO
飥?/p>
鐨勫彇鍊?/p>
鑼冨洿
.
銆愯�冪偣鍒嗘瀽銆?/p>
浜屾鍑芥暟缁煎悎棰?/p>
銆?/p>
PEC
鍒嗘瀽銆?/p>
锛?/p>
1
锛夌偣
A
鐨勫潗鏍囨槸绾靛潗鏍囦负
0
锛屽緱妯潗鏍囦负
8
锛屾墍浠ョ偣
A
鐨勫潗鏍囦负锛?/p>
8
锛?/p>
0
锛夛紱
鐐?/p>
B
鐨勫潗鏍囨槸妯潗鏍囦负
0
锛岃В寰楃旱鍧愭爣涓?/p>
6
锛屾墍浠ョ偣
B
鐨勫潗鏍囦负锛?/p>
0
锛?/p>
6
锛夛紱
鐢遍鎰忓緱锛?/p>
BC
鏄垹
ABO
鐨勮骞冲垎绾匡紝鎵�浠?/p>
OC=CH
锛?/p>
BH=OB=6
鈭?/p>
AB=10
锛屸埓
AH=4
锛岃
OC=x
锛屽垯
AC=8-x
鐢卞嬀鑲″畾鐞嗗緱锛?/p>
x=3
鈭寸偣
C
鐨勫潗鏍囦负锛?/p>
3
锛?/p>
0
锛夊皢姝や笁鐐逛唬鍏ヤ簩娆″嚱鏁颁竴鑸紡锛屽垪鐨勬柟绋嬬粍鍗冲彲姹傚緱锛?/p>
锛?/p>
2
锛夋眰寰楃洿绾?/p>
BC
鐨勮В鏋愬紡锛屾牴鎹钩琛屽洓杈瑰舰鐨勬�ц川锛屽瑙掔浉绛夛紝瀵硅竟骞宠涓旂浉绛夛紝鍊熷姪浜庝笁鍑?/p>
鏁板嵆鍙眰寰楋紱