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2015-2016
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涔濆勾绾ф暟瀛?/p>
涓�銆侀�夋嫨棰橈紙鍏?/p>
8
灏忛锛屾瘡灏忛
3
鍒嗭紝婊″垎
24
鍒嗭級
1
锛庡凡鐭ュ弽姣斾緥鍑芥暟
y=
k
x
锛?/p>
k
鈮?/p>
0
锛夌殑鍥捐薄缁忚繃鐐?/p>
M
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-2
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2
锛?/p>
锛屽垯
k
鐨勫�兼槸
A
锛?/p>
-4
B
锛?/p>
-1
C
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1
D
锛?/p>
4
2
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2
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B
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x
2
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2x -5 =0
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2
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3
锛庡湪
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ABC
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C=90
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BC=3
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4B=5
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A
锛?
3
4
B
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3
5
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4
5
D
锛?/p>
5
4
4
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10
鍚嶅鐢熻繘琛?/p>
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min
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75
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80
锛?/p>
85
锛?/p>
65
锛?/p>
95
锛?/p>
80
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85
锛?/p>
85
锛?/p>
80
锛?/p>
90
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A
锛?/p>
80
B
锛?/p>
81
C
锛?/p>
82
D
锛?/p>
83
5
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ABC
涓庘柍
A'B'C'
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A'B'C'
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1:2
锛庡凡鐭モ柍
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2
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A'B'C'
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1
B
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2
C
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4
D
锛?/p>
8
6
锛庡凡鐭ョ偣
4
锛堜竴
1
锛?/p>
y
1
锛?/p>
锛?/p>
B(l
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y
2
)
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y
3
)
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5
x
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1
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y
2
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y
3
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A
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y
1
< y
2
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3
B
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y
2
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l
C
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y
3
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2
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1
D
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7
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O
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30
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30
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C
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8
锛庡鍥撅紝鍦ㄢ柍
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锛?/p>
D
锛?/p>
E
鍒嗗埆鍦?/p>
AB
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AC
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浣垮緱鐐?/p>
4
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CE
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DE
鐨勯暱涓?/p>
A
锛?/p>
1
B
锛?/p>
2
C.3
D
锛?/p>
4
浜屻�佸～绌洪锛堝叡
8
灏忛锛屾瘡灏忛
3
鍒嗭紝婊″垎
24
鍒嗭級