建模第一次作业--编程组

1·syms x y,x=2,y=x^3+(x-0.98)^2/(x+1.25)^3-5*(x+1/x)

x =

2

y =

-4.4697

>> syms x y,x=4,y=x^3+(x-0.98)^2/(x+1.25)^3-5*(x+1/x)

x =

4

y =

42.8130
2·cos(60*pi/180)-(9-2^0.5)^(1/3)

ans =

-1.4649
3·a=3;
>> A=4;
>> b=a^2;
>> B=b^2-1;
c = a + A - 2*B;
>> C=a+B+2*c;
C =

-223