瀛︿範蹇呭
娆㈣繋涓嬭浇
2017-2018
瀛﹀勾
涔濆勾绾ф暟瀛︿笂鍐?/p>
鏈熸湯澶嶄範
--
浜屾鍑芥暟
涓�銆侀�夋嫨棰?/p>
1.
浜屾鍑芥暟
y=(x-1)
2
+2
鐨勬渶灏忓�兼槸
( )
A
锛?/p>
2
B
锛?/p>
1
C
锛?/p>
-1
D
锛?/p>
-2
2.
鑻ヤ簩娆″嚱鏁?/p>
y=x
2
锛?/p>
bx
锛?/p>
5
閰嶆柟鍚庝负
y=(x-2)
2
锛?/p>
k
锛屽垯
b
锛?/p>
k
鐨勫�煎垎鍒负
( )
A
锛?/p>
0
锛?/p>
5
B
锛?/p>
0
锛?/p>
1
C
锛?/p>
-4
锛?/p>
5
D
锛?/p>
-4
锛?/p>
1
3.
宸茬煡鎶涚墿绾?/p>
y=ax
2
+bx+c
鐨勫浘璞″鍥炬墍绀?/p>
,
鍒?/p>
|a
锕?/p>
b+c|+|2a+b|=
锛?/p>
锛?/p>
A
锛?/p>
a+b
B
锛?/p>
a
锕?/p>
2b
C
锛?/p>
a
锕?/p>
b
D
锛?/p>
3a
4.
涓嶈
m
涓轰綍瀹炴暟锛屾姏鐗╃嚎
y=x
2
锕?/p>
mx+m
锕?/p>
2
锛?/p>
锛?/p>
A
锛庡湪
x
杞翠笂鏂?/p>
B
锛庝笌
x
杞村彧鏈変竴涓氦鐐?/p>
C
锛庝笌
x
杞存湁涓や釜浜ょ偣
D
锛庡湪
x
杞翠笅鏂?/p>
5.
濡?/p>
鍥?/p>
鏄?/p>
浜?/p>
娆?/p>
鍑?/p>
鏁?/p>
y=ax
2
+bx+c
鍥?/p>
璞?/p>
鐨?/p>
涓�
閮?/p>
鍒?/p>
,
鍥?/p>
璞?/p>
杩?/p>
鐐?/p>
A(-3,0),
瀵?/p>
绉?/p>
杞?/p>
涓?/p>
鐩?/p>
绾?/p>
x=
锕?/p>
1
锛?/p>
缁?/p>
鍑?/p>
鍥?/p>
涓?/p>
缁?/p>
璁?/p>
锛?/p>
鈶?/p>
c
锛?/p>
0
锛?/p>
鈶?/p>
鑻?/p>
鐐?/p>
B(-1.5,y
1
)
銆?/p>
C(-2.5,y
2
)
涓?/p>
鍑?/p>
鏁?/p>
鍥?/p>
璞?/p>
涓?/p>
鐨?/p>
涓?/p>
鐐?/p>
锛?/p>
鍒?/p>
y
1
锛?/p>
y
2
锛?/p>
鈶?/p>
2a
锕?/p>
b=0
锛?/p>
鈶?
锛?/p>
0.
鍏?/p>
涓?/p>
姝?/p>
纭?/p>
缁?/p>
璁?/p>
鐨?/p>
涓?/p>
鏁?/p>
鏄?/p>
锛?/p>
锛?/p>