Im trying to plot two functions over a range

trying to plot two functions over a range

But only one function gives me correct values

The other one just gives one value

x=[0.2:0.1:0.7];

y1=1/((x/400 +(1-x)/80)(1/x+(0.5(1-x))))

y2 =1/(1/40)(1-x)+(1/400)(x)

what ami doing wrong

Answer 1

[Star Strider]

There are several missing operators (that I assume should be multiplication operators), and all the applidable operators should be element-wise, so (.*) instead of (*) and (./) instead of (/).

x=[0.2:0.1:0.7];
y1=1./((x/400 +(1-x)/80) .* (1./x+(0.5.*(1-x))));
y2 =1./(1/40) .* (1-x)+(1./400).*(x);

figure
plot(x, y1,  x, y2)
grid
legend('y_1','y_2', 'Location','best')

.