2
锛?/p>
1
缁煎悎娴嬭瘯鍗?/p>
涓�銆侀�夋嫨棰?/p>
1
锛庤
m
锛?/p>
n
涓洪潪闆跺悜閲忥紝鍒欌�滃瓨鍦ㄨ礋鏁?/p>
位
锛屼娇寰?/p>
m
锛?/p>
位
n
鈥濇槸鈥?/p>
m
路
n
<0
鈥濈殑
(
)
A
锛庡厖鍒嗚�屼笉蹇呰鏉′欢
B
锛庡繀瑕佽�屼笉鍏呭垎鏉′欢
C
锛庡厖鍒嗗繀瑕佹潯浠?/p>
D
锛庢棦涓嶅厖鍒嗕篃涓嶅繀瑕佹潯浠?/p>
瑙ｆ瀽锛?/p>
鑻?/p>
鈭?/p>
位
<0
锛屼娇
m
锛?/p>
位
n
锛屽垯涓ゅ悜閲?/p>
m
锛?/p>
n
鍙嶅悜锛屽す瑙掓槸
180掳
锛岄偅涔?/p>
m
路
n
锛?/p>
|
m
||
n
|cos 180掳
锛濓紞
|
m
||
n
|<0
锛涜嫢
m
路
n
<0
锛岄偅涔堜袱鍚戦噺鐨勫す瑙掍负
(90掳
锛?/p>
180掳
]
锛屽苟涓嶄竴瀹氬弽鍚戯紝鍗充笉涓�瀹氬瓨鍦ㄨ礋
鏁?/p>
位
锛屼娇寰?/p>
m
锛?/p>
位
n
锛屾墍浠ユ槸鍏呭垎鑰屼笉蹇呰鏉′欢锛屾晠閫?/p>
A.
绛旀锛?/p>
A
2
锛庝笅鍒楀垽鏂纭殑鏄?/p>
(
)
A
锛庘�滆嫢
a
2
<
b
2
锛屽垯
a
<
b
鈥濈殑鍚﹀懡棰樹负鐪熷懡棰?/p>
B
锛庡嚱鏁?/p>
f
(
x
)
锛?/p>
x
2
锛?/p>
9
锛?/p>
1
x
2
锛?/p>
9
鐨勬渶灏忓�间负
2
C
锛庡懡棰樷�滆嫢
x
锛?/p>
y
锛屽垯
sin
x
锛?/p>
sin
y
鈥濈殑閫嗗惁鍛介涓虹湡鍛介
D
锛庡懡棰樷�?/p>
鈭�
x
>0,2019
x
锛?/p>
2019>0
鈥濈殑鍚﹀畾鏄細鈥?/p>
鈭?/p>
x
0
鈮?/p>
0,2019
x
0
锛?/p>
2019
鈮?/p>
0
鈥?/p>
瑙ｆ瀽锛?/p>
瀵逛簬
A
閫夐」锛?/p>
鈥?/p>
鑻?/p>
a
2
<
b
2
锛屽垯
a
<
b
鈥?/p>
鐨勫惁鍛介涓?/p>
鈥?/p>
鑻?/p>
a
2
鈮?/p>
b
2
锛屽垯
a
鈮?/p>
b
鈥?/p>
锛屼笉濡ㄥ彇
a
锛濓紞
2
锛?/p>
b
锛?/p>
1
锛屽垯
a
2
鈮?/p>
b
2
鎴愮珛锛屼絾
a
鈮?/p>
b
涓嶆垚绔嬶紝
A
閫夐」涓殑鍛介涓嶆纭紱鐢卞熀鏈笉绛夊紡鍙緱
f
(
x
)
锛?
x
2
锛?/p>
9
锛?
1
x
2
锛?/p>
9
鈮?/p>
2
x
2
锛?/p>
9路
1
x
2
锛?/p>
9
锛?/p>
2
锛屽綋涓斾粎褰?
x
2
锛?/p>
9
锛?
1
x
2
锛?/p>
9
鏃讹紝鍗冲綋
x
2
锛?/p>
9
锛?/p>
1
鏃讹紝绛夊彿鎴愮珛锛屼絾
x
2
锛?/p>
9
鈮?/p>
3
锛?/p>
B
閫夐」涓殑鍛介閿欒锛涘浜?/p>
C
閫夐」锛屽懡棰?/p>
鈥?/p>
鑻?/p>
x
锛?
y
锛屽垯
sin
x
锛?/p>
sin
y
鈥?/p>
鏄湡鍛介锛屽叾閫嗗惁鍛介涔熶负鐪熷懡棰橈紝
C
閫夐」涓殑鍛介姝ｇ‘锛涘浜?/p>
D
閫夐」锛?/p>
鐢?/p>
鍏?/p>
绉?/p>
鍛?/p>
棰?/p>
鐨?/p>
鍚?/p>
瀹?/p>
鍙?/p>
鐭?/p>
锛?/p>
鍛?/p>
棰?/p>
鈥?/p>
鈭�
x
>0,2019
x
锛?/p>
2019>0
鈥?/p>
鐨?/p>
鍚?/p>
瀹?/p>
鏄?/p>
锛?/p>
鈥?/p>
鈭?/p>
x
0
>0,2019
x
0
锛?/p>
2019
鈮?/p>
0
鈥?/p>
锛?/p>
D
閫夐」涓殑鍛介閿欒锛庢晠閫?/p>
C.
绛旀锛?/p>
C
3
锛?/p>
鍛介
p
锛?/p>
鈭?/p>
x
0
鈭?/p>
R
锛?/p>
x
锛?/p>
2>0
锛?/p>
鍛介
q
锛?/p>
鈭�
x
鈭?/p>
R
锛?/p>
x
<
x
锛?/p>
鍒欎笅鍒楀懡棰樹腑涓虹湡鍛介鐨勬槸
(
)
A
锛?/p>
p
鈭?/p>
q
B
锛?/p>
p
鈭?/p>
q
C
锛?/p>
缍?/p>
p
鈭?/p>
q
D.
缍?/p>
p
鈭?/p>
缍?/p>
q
瑙ｆ瀽锛?/p>
鍛介
p
锛?/p>
鈭?/p>
x
0
鈭?/p>
R
锛?/p>
x
0
锛?/p>
2>0
涓虹湡鍛介
鍛介
缍?/p>
p
锛?/p>
鈭�
x
鈭?/p>
R
锛?/p>
x
锛?/p>
2
鈮?/p>
0
涓哄亣鍛介
鍛介
q
锛?/p>
鈭�
x
鈭?/p>
R
锛?/p>
x
<
x
涓哄亣鍛介
鍛介
缍?/p>
q
锛?/p>
鈭?/p>
x
鈭?/p>
R
锛?/p>
x
0
鈮?/p>
x
0
涓虹湡鍛介
鏄庢樉鍦帮紝绛旀閫?/p>
A.
绛旀锛?/p>
A
4
锛庤鍛介
p
锛?/p>
f
(
x
)
锛?/p>
1
x
鍦ㄥ畾涔夊煙涓婁负鍑忓嚱鏁帮紱鍛介
q
锛?/p>
g
(
x
)
锛?/p>
cos
飪?/p>
飪?/p>
飪?/p>
飪?/p>
x
锛?/p>
蟺
2
涓哄鍑芥暟锛屽垯涓嬪垪鍛?/p>
棰樹腑鐪熷懡棰樻槸
(
)
A
锛?/p>
(
缍?/p>
p
)
鈭?/p>
q
B. (
缍?/p>
p
)
鈭?/p>
(
缍?/p>
q
)
C
锛?/p>
p
鈭?/p>
q
D
锛?/p>
p
鈭?/p>
(
缍?/p>
q
)
瑙ｆ瀽锛?/p>
f
(
x
)
锛?/p>
1
x
鍦ㄥ畾涔夊煙涓婁笉鏄噺鍑芥暟锛屾晠鍛介
p
鏄亣鍛介锛?/p>