\(電腦在工程數學上的應用\ 第三次作業\ 河工4A\ B94520021\ 余東軒\)

\(1.  \(解下列多項式 : 
x\^3 + 
            1\) = 0\)
       (x^3) - 6  (x^2) + 11  x - 6 = 0
       (x^3) + 2  (x^2) + 2  x + 1 = 0

a[x_] = x
b[x_] = (x^3) + 1
c[x_] = (x^3) - 6  (x^2) + 11  x - 6
e[x_] = (x^3) + 2  (x^2) + 2  x + 1
NSolve[b[x] == 0, x, 10]
NSolve[c[x] == 0, x, 10]
NSolve[e[x] == 0, x, 10]

\(2.  解 \@\( 6 - 2  x\) - \@x = 1\)

NSolve[(Sqrt[6 - 2  x]) - (Sqrt[x]) == 1, x]