用MATLAB怎么解二元二次方程组
用matlab解二元二次方程组，可以直接用solve（）函数来求解。例如：
>>[x,y] = solve('x^2*y^2 - 2*x - 1 = 0','x^2 - y^2 - 1 = 0')
运行结果
对于较复杂的方程，也可以用数值分析的方法，如fsolve（）函数、二分法，牛顿法，求出其数值解。
绛旓細鐢╩atlab瑙ｄ簩鍏冧簩娆℃柟绋嬬粍锛鍙互鐩存帴鐢╯olve锛堬級鍑芥暟鏉ユ眰瑙銆備緥濡傦細>>[x,y] = solve('x^2*y^2 - 2*x - 1 = 0','x^2 - y^2 - 1 = 0')杩愯缁撴灉 瀵逛簬杈冨鏉傜殑鏂圭▼锛屼篃鍙互鐢ㄦ暟鍊煎垎鏋愮殑鏂规硶锛屽fsolve锛堬級鍑芥暟銆佷簩鍒嗘硶锛岀墰椤挎硶锛屾眰鍑哄叾鏁板艰В銆
绛旓細渚嬪瓙锛氳В鏂圭▼锛9x+8y=10寮113x+14y=12寮2matlab浠ｇ爜涓猴細[x,y]=solve('9*x+8*y=10','13*x+14*y=12','x','y')杩欎釜鏂规硶閫傜敤浜巒鍏僲娆℃柟绋嬬粍鐨勩
绛旓細x=sqrt(2*y^2-1);if x==round(x)a=[x y]else end end杩愯缁撴灉锛歛 = 1 1a = 7 5a = 41 29a = 239 169a = 1393 985a = 8119 5741a = 47321 33461a=[x y]琛ㄧず涓缁勮В
绛旓細1銆侀鍏堢湅涓涓媘atlab姹傝В鏂圭▼鐨勬柟娉曪紝鎸囨槑鎵瑙ｆ柟绋嬬殑鍙橀噺锛岀劧鍚庢寚鏄庢柟绋嬶紝鏈煡鏁板拰闄愬埗鏉′欢锛屾渶鍚庢眰瑙ｆ柟绋銆2銆佹潵姹傝Вsin(x)=1鏂圭▼锛屽湪matlab鍛戒护琛岀獥鍙ｄ腑杈撳叆symsx [x,params,conds]=solve (sin(x)==1,'ReturnConditions', true) 锛屾寜鍥炶溅閿彲浠ュ緱鍒版柟绋嬭В锛屽涓嬪浘鎵绀恒3銆佽浆鎹竴涓嬶紝鍙互鐪嬪埌sin...
绛旓細鍦ㄥ懡浠ょ獥鍙ｉ敭鍏 [x,y]=solve('x^2+y^2=1','x*y=2')缁撴灉濡備笅 x = ((15^(1/2)*i)/2 + 1/2)^(1/2)/2 - ((15^(1/2)*i)/2 + 1/2)^(3/2)/2 ((15^(1/2)*i)/2 + 1/2)^(3/2)/2 - ((15^(1/2)*i)/2 + 1/2)^(1/2)/2 (1/2 - (15^(1/...
绛旓細鐢∕ATLAB姹浜屽厓浜屾鏂圭▼鐨勬渶澶у硷紝鍙互鐢╢minsearch锛堬級鏋佸皬鍊煎嚱鏁版潵姹傘傛眰瑙ｆ椂锛屽洜灏嗘眰瑙ｅ嚱鏁板啓鎴愬弽鍑芥暟鐨勫舰寮忋傚姹俧(x,y)=34.052x+399.014y-0.201x²-55.529y²+4.508xy-1019.389鐨勬瀬澶у硷紝鍒欓棶棰樼瓑浠蜂簬姹-f(x,y)銆傝В鍐宠繃绋嬶細>> fun=@(x) -(34.052*x(1)+399.014...
绛旓細syms x y [x,y]=solve(y==-0.025828*x^2+0.22057*x+0.29654,x^2+y^2==0.3015,x,y);x=double(x),y=double(y)缁撴灉锛歺 = -0.5205 + 0.0000i 0.3964 + 0.0000i 8.6020 +38.4366i 8.6020 -38.4366i y = 0.1747 + 0.0000i 0.3799 + 0.0000i 38.4403 - 8....
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绛旓細鏂规硶锛歴yms a b c d x y;solve('(x-0.5)^2/a^2-y^2/b^2=1 ', '(y-0.5)^2/c^2-x^2/d^2=1')鎶婁笂闈㈢殑鍛戒护澶嶅埗绮樿创鍒癿atlab鐨刢ommand windows閲屽氨琛屼簡銆備綘杩欐槸涓ゆ潯鍙屾洸绾挎眰浜ょ偣锛屽洜姝ゅ簲璇ユ湁鍥涗釜瑙ｃ傚鏋鐢╩atlab绗﹀彿瑙ｅ緱璇濓紝涓鑸殑璁＄畻鏈烘牴鏈彈涓嶄簡锛屽お鎱簡銆傛墍浠ユ病缁欎綘缁撴灉...
绛旓細2.1*v*sina*t=y+0.5*85*t*t ctg(a)=(x-0.5*w*2.1*t*t)/(y+0.5*85*t*t)t*t= (x-yctg(a))/(85ctg(a)/2+2.1*w/2)涓婂紡澶т簬绛変簬0鏃 瑙ｅ緱t=sqrt(t*t)v= (x-0.5*w*2.1*t*t)/(2.1*cosa*t)浠ｅ叆t璁＄畻杩囩▼ 涓嶈兘鍖栫畝鍗曞舰寮忥紝鎸夌収涓婇潰鐨勬楠ゅ彲浠ヨ绠...
