Display the polynomial : f(x)-x^5+1​2.1x^4=40.​59x^3-17.0​15x^2-1.95​x+35.88, the calculate f(5)

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Li Hui Chew
Li Hui Chew 2021-6-24
回答： KSSV 2021-6-24
syms x
f=coeff(x^5 - 12.1*x^4 = 40.59*x^3 - 17.015*x^2 -1.95*x + 35.88)
% do i need to use this function?
% or use print function?
% to calculate f(5)
x=[5];
y=polyval(f,x)

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采纳的回答

KSSV
KSSV 2021-6-24
Ran in:
syms x
f=(x^5 - 12.1*x^4 - 40.59*x^3 + 17.015*x^2 +1.95*x - 35.88)
f = 
y=subs(f,5)
y = 

更多回答（1 个）

Walter Roberson
Walter Roberson 2021-6-24
Ran in:
syms x
f = sym2poly(x^5 - 12.1*x^4 + 40.59*x^3 - 17.015*x^2 -1.95*x + 35.88)
f = 1×6
1.0000 -12.1000 40.5900 -17.0150 -1.9500 35.8800

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