solve that,{x+y=100 {0.9x+1.4y=100×(1+0.2)

solve that,{x+y=100 {0.9x+1.4y=100×(1+0.2) 常微分solve the equation(x+4y)y'=2x+3y+5 solve the problems4^x-8^y=03^(X+1).9^(-y)=1 suppose that f(x)=3x+5 and g(x)=-2x+15.solve |f(suppose that f(x)=3x+5 and g(x)=-2x+15.solve |f(x)|>2 Matlab中solve函数的特殊应用y=f(x);solve('y=0','x');因为f(x)非常复杂,需要定义几个函数.那么用solve的时候如何实现呢? matlab中,定义了y='x+1',如果调用solve（‘eq1’,即要求solve（'x+1=0','x'）. A function f is such that f(x)=ln(5x-10) solve f(x)=0 use elimination to solve each system of equations 例子:X- Y= 1 X + Y= 3 and 3x-y=26 -2x-y= -24 急用matlab求二元三次方程组及程序代码!方程：-100/x^2/y+17/40/x^3/y^2+7505627081381631/9007199254740992/x^2=0,-100/x/y^2+17/40/x^2/y^3=0我输入 clear;>> syms x y;>> [x,y]=solve('-100/x^2/y+17/40/x^3/y^2+7505627081381631/900719925474 如何求这个二元三次方程组精确解?用matlab他说没有显式解.方程：-100/x^2/y+17/40/x^3/y^2+7505627081381631/9007199254740992/x^2=0,-100/x/y^2+17/40/x^2/y^3=0我输入 clear;>> syms x y;>> [x,y]=solve('-100/x^2/y+17/40/x^3/y^2+7505 matlab用solve解方程syms x y c en fai;[x,y]=solve('log(y.*(1-x)/(x.*(1-y)))+en','y.*(1-c.*sum((k.*(y./x).^k)/sum(((y./x).*exp(en-2.*pi)).^k)))+x.*c.*sum((k.*(y./x).^k/sum(((y./x)*exp(en-2.*pi)).^k))-fai')Error using ==> solve' log(y.*(1-x)/(x.*(1- solve x^4 - 2x^3 + 4x^2 + 30x - 13 = 0 given that 2+3i is a root. 如何用matlab解二元方程[x,y]=solve('1351.565-14.85*13-379.25*x-1.025*y.^2-27.25*y = 0','222.5-2.7*13-27.75*x-0.45*y.^2-2.05*x*y-0.36*13*y=0','x','y')Error using ==> solve>getEqns at 182' 1351.565-14.85*13-379.25*x-1.025*y.^2-27.25*y = 0 ' is n Mathematica语句 Solve[y'[x] == -a y[x] + b x, y[x], x] 为何没有输出表达式?原式有误,Solve应为DSolveDSolve[y'[x] == -a y[x] + b x, y[x], x]一楼没能说明为何程序有时会不灵:没有输出表达式? 用matlab中的solve解方程组,怎样保留其中一个符合条件的解%例如：f1 = (x - x1)/(a-x1) - (y-y1)/(b-y1);f2 = (x-x1)^2+(y-y1)^2 - r^2; %两个方程,其中a b r x1 y1都是已知量[x,y] = solve(f1,f2); %用solve解方程组x=double( Suppose that f(x)=|-3x+2| and g(x)=x+10 第一题solveSuppose that f(x)=|-3x+2| and g(x)=x+10第一题solve f(x) matlab中不是不用定义变量吗?但为啥有在求方程组解时,需要>> syms x y >> [x,y]=solve(x^2+y-6,y^2+x-6),而不是直接用>> [x,y]=solve(x^2+y-6,y^2+x-6),就行了, Solve the system by the addtion method,and identify the value of y of the solution.3x - y = 55x + 3y = -1