2019-2020
骞翠腑鑰冩暟瀛?/p>
涓撻
13
鍑芥暟涔嬩竴娆″嚱鏁般�?/p>
鍙嶆瘮渚嬪嚱鏁板拰浜屾鍑芥暟缁煎悎闂?
棰橈紙鍚В鏋愶級
涓�冨帇杞撮涓嚱鏁颁箣涓�娆″嚱鏁般�佸弽姣斾緥鍑芥暟鍜屼簩娆″嚱鏁扮患鍚堥棶棰橈紝閫夋嫨鍜屽～绌洪涓昏鏄竴娆″嚱鏁般�佸弽
姣斾緥鍑芥暟鍜屼簩娆″嚱鏁板浘璞＄殑鍒嗘瀽锛岃В
绛旈闆嗕腑琛ㄧ幇涓轰竴娆″嚱鏁板拰浜屾鍑芥暟缁煎悎闂
銆?/p>
涓�
.
涓�娆″嚱鏁般�佸弽姣斾緥鍑芥暟鍜屼簩娆″嚱鏁板浘璞＄殑鍒嗘瀽闂
1.
涓�娆″嚱鏁?/p>
y=a
x+b
锛?/p>
a
锛?/p>
0
锛?/p>
銆佷簩娆″嚱鏁?/p>
y=ax
2
+bx
鍜屽弽姣斾緥鍑芥暟
y=
锛坘鈮?锛夊湪鍚屼竴鐩磋鍧愭爣绯讳腑鐨勫浘璞″鍥?/p>
鎵�绀猴紝
A
鐐圭殑鍧愭爣涓猴紙锕?/p>
2
锛?/p>
0
锛?/p>
锛屽垯涓嬪垪缁撹涓紝姝ｇ‘鐨勬槸锛?/p>
锛?/p>
A.a
锛?/p>
b
锛?/p>
0 B.a
锛?/p>
k
锛?/p>
0 C.b=2a+k D.a=b+k
銆愮瓟妗堛�?/p>
B
銆愯В鏋愩�?/p>
璇曢鍒嗘瀽锛氭牴鎹嚱鏁板浘璞＄煡锛岀敱涓�娆″嚱鏁板浘璞℃墍鍦ㄧ殑璞￠檺鍙互纭畾
a
銆?/p>
b
鐨勭鍙凤紝涓旂洿绾夸笌鎶涚墿绾垮潎缁忚繃鐐?/p>
A
锛?/p>
鎵�浠ユ妸鐐?/p>
A
鐨勫潗鏍囦唬鍏ヤ竴娆″嚱鏁版垨浜屾鍑芥暟鍙互姹傚緱
b=2a
锛?/p>
k
鐨勭鍙峰彲浠ユ牴鎹?/p>
鍙屾洸绾挎墍鍦ㄧ殑璞￠檺杩涜鍒?/p>
瀹氾紟
瑙ｏ細
鈭垫牴鎹浘绀虹煡锛屼竴娆″嚱鏁颁笌浜屾鍑芥暟鐨勪氦鐐?/p>
A
鐨勫潗鏍囦负锛堬梗
2
锛?/p>
0
锛?/p>
锛?/p>
鈭达梗
2a+b=0
锛?/p>
鈭?/p>
b=2a
锛?/p>
鏁呮湰閫夐」閿欒锛?/p>
B
銆佽瀵熶簩娆″嚱鏁?/p>
y=ax
2
+bx
鍜屽弽姣斾緥鍑芥暟
y=
锛坘鈮?锛夊浘璞＄煡锛屽綋
x=
锕?/p>
=
锕?/p>
=
锕?/p>
1
鏃讹紝
y=
锕?/p>
k
锛烇梗
=
锕?/p>
=
锕?/p>
a
锛屽嵆
k
锛?/p>
a
锛?/p>
鈭?/p>
a
锛?/p>
0
锛?/p>
k
锛?/p>
0
锛?/p>
鈭?/p>
a
锛?/p>
k
锛?/p>
0
锛?/p>