(2/2)次方o (那个圆周率读pai，表示什么我忘了，高一出现的）（o中间有一横我打不出来）希望快点解答...
\u8ba1\u7b97\uff08\u5706\u5468\u7387-3.14\uff09\u76840\u6b21\u65b9-3+\uff081/2\uff09\u7684-1\u6b21\u65b9-\uff08-1\uff09\u76842010\u6b21\u65b9\uff08\u5706\u5468\u7387-3.14\uff09\u76840\u6b21\u65b9-3+\uff081/2\uff09\u7684-1\u6b21\u65b9-\uff08-1\uff09\u76842010\u6b21\u65b9
=1+2-1
=3-1
=2
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sin（圆周率-o）*3+1*coso=0
3sino+*coso=0
tano=-1/3
2sin ocos o+cos^2o=coso(2sino+coso)=-sinocoso=3/10
1、sin(π-0)=sin0
a=(sin0,1)
a⊥b
a*b=0
3sin0+cos0=0
tan0=-1/3
2、2sin0cos0+cos²0=（2sin0cos0+cos²0）/1=（2sin0cos0+cos²0）/sin²0+cos²0
分子分母同时除以cos²0
=2tan0+1/tan0²+1=3/10
绛旓細y'(2)鎰忔濅负y=y(x)鍦▁=2澶勭殑瀵兼暟鍊笺倅=y(x)琛ㄧずy鏄痻鐨勫嚱鏁帮紝閭ｄ箞y'鏄痽瀵箈姹傚锛屽緱鍒扮殑杩樻槸x鐨勫嚱鏁帮紝鍐欐垚y'(x)銆傞偅涔坹'(2)灏辨槸y瀵箈姹傚鐨勮繖涓鍑芥暟y'鍦▁=2鐨勬椂鍊欑殑鍊硷紝鍗硑=y(x)鍦▁=2澶勭殑瀵兼暟鍊硷紝灏辨槸鍏堟眰y'锛屽啀鎶妜=2浠ｅ叆銆倅锛漻²锛屽垯y'=2x锛寈=2浠ｅ叆寰梱'=4锛...
绛旓細瀵规诲帤搴﹀皬浜 位/4 鐨勫湴璐ㄦā鍨嬪強鍏跺湴闇囧搷搴旂壒寰佸垎鏋愯〃鏄,鐢卞帤搴︿笉鍚岀殑鐮傚博钖勫眰缁勬垚鐨勭爞娉ュ博钖勪簰灞傝櫧鐒跺唴閮ㄦ帓鍒楁柟寮忎笉鍚,浣嗗叾鍦伴渿鍝嶅簲鐗瑰緛澶ц嚧鐩稿悓銆 (2)涓嶅悓娌夌Н寰浉鍦伴渿鍙嶅皠鐗瑰緛 娴庨槼鍧抽櫡鍖楅儴棣嗛櫠缁勬矇绉爞浣撳寘鎷渤閬撳瀷銆佺爞鍧濆瀷銆佹极婊╁瀷绛夊偍闆嗕綋绫诲瀷銆 (楂橀熴佷綆閫)涓ょ鍥村博浠嬭川銆傜敱浜庣爞璐ㄦ偿宀╁拰娉ヨ川鐮傚博閫熷害楂樹簬...
绛旓細闆嗗悎鏄寚鍏锋湁鏌愮鐗瑰畾鎬ц川鐨勫叿浣撶殑鎴栨娊璞＄殑瀵硅薄姹囨昏屾垚鐨勯泦浣撱傚叾涓紝鏋勬垚闆嗗悎鐨勮繖浜涘璞″垯绉颁负璇ラ泦鍚堢殑鍏冪礌[1-2] [3] 銆備緥濡傦紝鍏ㄤ腑鍥戒汉鐨勯泦鍚堬紝瀹冪殑鍏冪礌灏辨槸姣忎竴涓腑鍥戒汉銆傞氬父鐢ㄥぇ鍐欏瓧姣嶅A,B,S,T,...琛ㄧず闆嗗悎锛岃岀敤灏忓啓瀛楁瘝濡俛,b,x,y,...琛ㄧず闆嗗悎鐨勫厓绱犮傝嫢x鏄泦鍚圫鐨勫厓绱狅紝鍒欑Оx灞...
绛旓細two鑻盵tu:]缇嶽tu]n.涓や釜;涓や釜涓滆タ;涓ょ偣閽;涓瀵;adj.涓や釜鐨;鎴戝悓;num.涓や釜;绗浜;浜;鍙岃渚嬪彞1.It'salongwaytogofortwopeopleintheirseventies.瀵逛簬涓や釜涓冨崄鍑犲瞾鐨勪汉鏉ヨ锛岃繖娈佃矾澶繙浜嗐2.Helosttwostoneinweightduringhistimethere.浠栧湪閭ｅ効鐨勬椂鍊欎綋閲嶄笅闄嶄簡2鑻辩煶銆3.Iundidthebottomtwobuttons...
绛旓細1.鍙樺樊鍑芥暟涓庡崗鏂瑰樊鐨勫嚱鏁板叧绯 2纬(h)=E[Z(x)-Z(x+h)]2=E[Z(x)]2+E[Z(x+h)]2-2E[Z(x)路Z(x+h)]鍦浜闃跺钩绋虫潯浠朵笅,褰揾=0鏃 Var[ Z(x)]=C(0) , ∀x 鍗 C(0)=Var[Z(x)]=E[Z(x)]2-{E[Z(x)]}2=E[Z(x)]2-m2 鍒 E[Z(x)]2=C(0)+m2 E[...
绛旓細琛ㄧず姊18锛2璺紝姊佸300銆侀珮700锛涚畭绛嬫槸涓绾ч挗鐩村緞8mm锛屽姞瀵嗗尯闂磋窛100锛岄潪鍔犲瘑鍖洪棿璺200锛屽弻鑲㈢畭锛涙涓婇儴閫氶暱绛2鏍25mm鐨勪竴绾ч挗銆寤虹瓚鍥剧焊閽㈢瓔绗﹀彿琛ㄧず鏂规硶濡備笅锛毾10@100/200(2) 琛ㄧず绠嶇瓔涓合10 锛屽姞瀵嗗尯闂磋窛100锛岄潪鍔犲瘑鍖洪棿璺200锛屽叏涓哄弻鑲㈢畭銆傁10@100/200(4) 琛ㄧず绠嶇瓔涓合10 锛...
绛旓細1.淇濇湰閿閲=鍥哄畾鎴愭湰梅锛堝崟浠-鍗曚綅鍙樺姩鎴愭湰锛2.褰撶洰鏍囧埄娑︿负10000鍏冩椂锛岃绠楃洰鏍囬攢鍞銆 鐩爣杈归檯璐＄尞=鐩爣鍒╂鼎+鍥哄畾鎴愭湰=10000+20000=30000 鍏 鍙﹀鐩爣閿鍞噺=鐩爣杈归檯璐＄尞梅锛堝崟浠-鍗曚綅鍙樺姩鎴愭湰锛夌洰鏍囬攢鍞=鍗曚环脳鐩爣閿鍞噺銆 鎷撳睍璧勬枡锛 涓銆佷繚鏈攢鍞鐨勮绠楀叕寮忔槸锛 淇濇湰閿鍞锛 闂存帴璐+钀ヤ笟...
绛旓細锛2锛夊弻璇緥鍙ワ細Traffic is slow on westbound I-80.I-80鍙峰叕璺悜瑗跨殑杞︽祦琛岄┒缂撴參 Progress has been painfully slow.杩涘害鎱㈠緱浠や汉鐒︽ャ2.Stop vt. 鍋滄锛涘牭濉烇紱鏂粷 vi. 鍋滄锛涗腑姝紱閫楃暀锛涜濉炰綇 n. 鍋滄锛涜溅绔欙紱闅滅锛涢楃暀 锛1锛夌浉鍏崇煭璇細bus stop 鍏叡姹借溅绔 stop at 浣忓锛涢楃暀鍦紱瀵...
绛旓細鑻辫涓鑻辫浜鐨勬剰鎬濆涓嬶細1銆佸鏈瀷鐮旂┒鐢熷拰涓撲笟瀛︿綅鐮旂┒鐢熴傝岀爺绌剁敓鍏ュ鑻辫鑰冭瘯涔熺浉搴旂殑鐢变互鍓嶇殑涓鍗风粺鑰冨舰寮忓垎涓轰袱绉嶈瘯鍗疯冩煡锛屽嵆鑻辫涓鍜岃嫳璇簩銆2銆佽嫳璇竴鏄负楂樼瓑闄㈡牎鍜岀鐮旈櫌鎵鎷涙敹鐨勭澹爺绌剁敓鑰岃缃殑鍏锋湁閫夋嫈鎬ц川鐨勭粺鑰冪鐩紝鑰岃嫳璇簩涓昏鏄负楂樼瓑闄㈡牎鍜岀鐮旈櫌鎵鎷涙敹涓撲笟瀛︿綅纭曞＋鐮旂┒鐢熻岃缃殑...
绛旓細璇烽噰绾
