2018
骞村叏鍥藉悇鍦颁腑鑰冩暟瀛﹀帇杞撮姹囩紪锛堟箹鍗椾笓鐗堬級
閫夋嫨銆佸～绌?/p>
涓�锛庨�夋嫨棰橈紙鍏?/p>
13
灏忛锛?/p>
1
锛庯紙
2018鈥?/p>
闀挎矙锛夋垜鍥藉崡瀹嬭憲鍚嶆暟瀛﹀绉︿節闊剁殑钁椾綔銆婃暟涔︿節绔犮�嬮噷璁拌浇鏈夎繖鏍蜂竴閬撻
鐩細
鈥?/p>
闂湁娌欑敯涓�鍧楋紝
鏈変笁鏂滐紝
鍏朵腑灏忔枩浜旈噷锛?/p>
涓枩鍗佷簩閲岋紝
澶ф枩鍗佷笁閲岋紝
娆茬煡涓虹敯鍑犱綍锛?/p>
鈥?/p>
杩欓亾棰樿鐨勬槸锛氭湁涓�鍧椾笁瑙掑舰娌欑敯锛屼笁鏉¤竟闀垮垎鍒负
5
閲岋紝
12
閲岋紝
13
閲岋紝闂繖鍧楁矙鐢伴潰
绉湁澶氬ぇ锛熼涓?/p>
鈥?/p>
閲?/p>
鈥?/p>
鏄垜鍥藉競鍒堕暱搴﹀崟浣嶏紝
1
閲?/p>
=500
绫筹紝鍒欒娌欑敯鐨勯潰绉负锛?/p>
锛?/p>
A
锛?/p>
7.5
骞虫柟鍗冪背
B
锛?/p>
15
骞虫柟鍗冪背
C
锛?/p>
75
骞虫柟鍗冪背
D
锛?/p>
750
骞虫柟鍗冪背
2
锛庯紙
2018鈥?/p>
鏍床锛夊凡鐭ヤ竴绯诲垪鐩寸嚎
y=a
k
x
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锛?/p>
a
k
鍧囦笉鐩哥瓑涓斾笉涓洪浂锛?/p>
a
k
鍚屽彿锛?/p>
k
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2
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b
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0
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y=0
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A
k
锛岃
A
k
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x
k
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1
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鈮?/p>
k
锛?/p>
1
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j
鈮?/p>
k
锛?/p>
i
鈮?/p>
j
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锛?/p>
A
锛庡ぇ浜?/p>
1
B
锛庡ぇ浜?/p>
0
C
锛庡皬浜庯梗
1
D
锛庡皬浜?/p>
0
3
锛庯紙
2018鈥?/p>
琛￠槼锛夊浜庡弽姣斾緥鍑芥暟
y=
锕?/p>
锛屼笅鍒楄娉曚笉姝ｇ‘鐨勬槸锛?/p>
锛?/p>
A
锛庡浘璞″垎甯冨湪绗簩銆佸洓璞￠檺
B
锛庡綋
x
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0
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y
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x
鐨勫澶ц�屽澶?/p>
C
锛庡浘璞＄粡杩囩偣锛?/p>
1
锛岋梗
2
锛?/p>
D
锛庤嫢鐐?/p>
A
锛?/p>
x
1
锛?/p>
y
1
锛夛紝
B
锛?/p>
x
2
锛?/p>
y
2
锛夐兘鍦ㄥ浘璞′笂锛屼笖
x
1
锛?/p>
x
2
锛屽垯
y
1
锛?/p>
y
2
4
锛庯紙
2018鈥?/p>
闀挎矙锛夎嫢瀵逛簬浠绘剰闈為浂瀹炴暟
a
锛屾姏鐗╃嚎
y=ax
2
+
ax
锕?/p>
2a
鎬讳笉缁忚繃鐐?/p>
P
锛?/p>
x
0
锕?/p>
3
锛?/p>
x
0
2
锕?/p>
16
锛夛紝鍒欑鍚堟潯浠剁殑鐐?/p>
P
锛?/p>
锛?/p>
A
锛庢湁涓斿彧鏈?/p>
1
涓?/p>
B
锛庢湁涓斿彧鏈?/p>
2
涓?/p>
C
锛庤嚦灏戞湁
3
涓?/p>
D
锛庢湁鏃犵┓澶氫釜
5
锛庯紙
2018鈥?/p>
琛￠槼锛夊鍥撅紝鎶涚墿绾?/p>
y=ax
2
+
bx
+
c
涓?/p>
x
杞翠氦浜庣偣
A
锛堬梗
1
锛?/p>
0
锛夛紝椤剁偣鍧愭爣锛?/p>
1
锛?/p>
n
锛変笌
y
杞寸殑浜ょ偣鍦紙
0
锛?/p>
2
锛夛紝锛?/p>
0
锛?/p>
3
锛変箣闂达紙鍖呭惈绔偣锛夛紝鍒欎笅鍒楃粨璁猴細鈶?/p>
3a
+
b
锛?/p>
0
锛?/p>
鈶★梗
1
鈮?/p>
a
鈮わ梗
锛?/p>
鈶㈠浜庝换鎰忓疄鏁?/p>
m
锛?/p>
a
+
b
鈮?/p>
am
2
+
bm
鎬绘垚绔嬶紱
鈶ｅ叧浜?/p>
x
鐨勬柟绋?/p>
ax
2
+
bx
+
c=n
锕?/p>
1
鏈変袱涓笉鐩哥瓑鐨勫疄鏁版牴锛庡叾涓粨璁烘纭殑涓暟涓猴紙
锛?/p>