2019-2020
骞村叓骞寸骇鏁板涓婂唽
鐭ヨ瘑鐐规�荤粨
1
銆佸嬀鑲″畾鐞?/p>
鐩磋涓夎褰袱鐩磋杈?/p>
a
锛?/p>
b
鐨勫钩鏂瑰拰绛変簬鏂滆竟
c
鐨勫钩鏂癸紝鍗?/p>
2
2
2
c
b
a
飥?/p>
飥?/p>
2
銆佸嬀鑲″畾鐞嗙殑閫嗗畾鐞?/p>
濡傛灉涓夎褰㈢殑涓夎竟闀?/p>
a
锛?/p>
b
锛?/p>
c
鏈夊叧绯?/p>
2
2
2
c
b
a
飥?/p>
飥?/p>
锛岄偅涔堣繖涓笁瑙掑舰鏄洿瑙掍笁瑙掑舰銆?/p>
3
銆佸嬀鑲℃暟
锛氭弧瓒?/p>
2
2
2
c
b
a
飥?/p>
飥?/p>
鐨勪笁涓鏁存暟锛岀О涓哄嬀鑲℃暟銆?/p>
绗竴绔?/p>
瀹炴暟
涓�銆佸疄鏁扮殑姒傚康鍙婂垎绫?/p>
1
銆佸疄鏁扮殑鍒嗙被
姝ｆ湁鐞嗘暟
鏈夌悊鏁?/p>
闆?/p>
鏈夐檺灏忔暟鍜屾棤闄愬惊鐜皬鏁?/p>
瀹炴暟
璐熸湁鐞嗘暟
姝ｆ棤鐞嗘暟
鏃犵悊鏁?/p>
鏃犻檺涓嶅惊鐜皬鏁?/p>
璐熸棤鐞嗘暟
2
銆佹棤鐞嗘暟锛?/p>
鏃犻檺涓嶅惊鐜皬鏁板彨鍋氭棤鐞嗘暟銆?/p>
鍦ㄧ悊瑙ｆ棤鐞嗘暟鏃讹紝瑕佹姄浣忊�滄棤闄愪笉寰幆鈥濊繖涓�鏃朵箣锛屽綊绾宠捣鏉ユ湁鍥涚被锛?/p>
锛?/p>
1
锛夊紑鏂瑰紑涓嶅敖鐨勬暟锛屽
3
2
,
7
绛夛紱
锛?/p>
2
锛夋湁鐗瑰畾鎰忎箟鐨勬暟锛屽鍦嗗懆鐜?/p>
蟺
锛屾垨鍖栫畝鍚庡惈鏈?/p>
蟺
鐨勬暟锛屽
3
蟺
+8
绛夛紱
锛?/p>
3
锛夋湁鐗瑰畾缁撴瀯鐨勬暟锛屽
0.1010010001
鈥︾瓑锛?/p>
锛?/p>
4
锛夋煇浜涗笁瑙掑嚱鏁板�硷紝濡?/p>
sin60
o
绛?/p>
浜屻�佸疄鏁扮殑鍊掓暟銆佺浉鍙嶆暟鍜岀粷瀵瑰�?/p>
1
銆佺浉鍙嶆暟
瀹炴暟涓庡畠鐨勭浉鍙嶆暟鏃朵竴瀵规暟锛堝彧鏈夌鍙蜂笉鍚岀殑涓や釜鏁板彨鍋氫簰涓虹浉鍙嶆暟锛岄浂鐨勭浉鍙嶆暟鏄?/p>
闆讹級
锛?/p>
浠庢暟杞翠笂鐪嬶紝
浜掍负鐩稿弽鏁扮殑涓や釜鏁版墍瀵瑰簲鐨勭偣鍏充簬鍘熺偣瀵圭О锛?/p>
濡傛灉
a
涓?/p>
b
浜掍负鐩稿弽鏁帮紝
鍒欐湁
a+b=0
锛?/p>
a=
鈥?/p>
b
锛屽弽涔嬩害鎴愮珛銆?/p>
2
銆佺粷瀵瑰�?/p>
鍦ㄦ暟杞翠笂锛屼竴涓暟鎵�瀵瑰簲鐨勭偣涓庡師鐐圭殑璺濈锛屽彨鍋氳鏁扮殑缁濆鍊笺�?/p>
锛?/p>
|a|
鈮?/p>
0
锛?/p>
銆傞浂鐨勭粷瀵?/p>
鍊兼槸瀹冩湰韬紝涔熷彲鐪嬫垚瀹冪殑鐩稿弽鏁帮紝鑻?/p>
|a|=a
锛屽垯
a
鈮?/p>
0
锛涜嫢
|a|=-a
锛屽垯
a
鈮?/p>
0
銆?/p>
3
銆佸�掓暟
濡傛灉
a
涓?/p>
b
浜掍负鍊掓暟锛屽垯鏈?/p>
ab=1
锛屽弽涔嬩害鎴愮珛銆傚�掓暟绛変簬鏈韩鐨勬暟鏄?/p>
1
鍜?/p>
-1
銆傞浂娌℃湁
鍊掓暟銆?/p>
4
銆佹暟杞?/p>
瑙勫畾浜嗗師鐐广�?/p>
姝ｆ柟鍚戝拰鍗曚綅闀垮害鐨勭洿绾垮彨鍋氭暟杞?/p>
锛堢敾鏁拌酱鏃讹紝
瑕佹敞鎰忎笂杩拌瀹氱殑涓夎绱?/p>
缂轰竴涓嶅彲锛?/p>
銆?/p>
瑙ｉ鏃惰鐪熸鎺屾彙鏁板舰缁撳悎鐨勬�濇兂锛?/p>
鐞嗚В瀹炴暟涓庢暟杞寸殑鐐规槸涓�涓�瀵瑰簲鐨勶紝
骞惰兘鐏垫椿杩愮敤銆?/p>
5
銆佷及绠?/p>
涓夈�佸钩鏂规牴銆佺畻鏁板钩鏂规牴鍜岀珛鏂规牴