MATLAB: How to plot

homeworki don't know.symbolicSymbolic Math Toolbox

I'm a biginer. This is my homework.

f(x) = x/12(1-x)

How does this plot ?

Thank you for your helpig

doc fplot

I don't have the Symbolic Math Toolbox, so I can't comment on your code. But this worked for me.

f = @(x) (cos(x)).*(cosh(x))+1;
figure
fplot(f)
xlim([0 10]);
ylim([-100 500]);

Use function handles. However, note that there is a singularity at 0.

f=@(x) (exp(x)-1-x)./(x.^2);
x = linspace(-1e-11, 1e-11, 100);
y = f(x);
plot(x, y);