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how to plot the graph y={1}/{1+10^{x/400}}
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Lauren Hosking
am 30 Sep. 2020
Bearbeitet: Lauren Hosking
am 30 Sep. 2020
Im completely new to matlab. i want to plot the graph y={1}/{1+10^{x/400}} to show what happens when x tends to minus infinity and infinity is this possible.
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Ameer Hamza
am 30 Sep. 2020
Bearbeitet: Ameer Hamza
am 30 Sep. 2020
You can plot it over a large range to see the trend
x = linspace(-1000, 1000);
y = @(x) 1./(1+10.^(x/400));
plot(x, y(x))
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/368998/image.png)
You can also put the value at infinity
>> y(inf)
ans =
0
>> y(-inf)
ans =
1
If you have symbolic toolbox
syms x
y = 1/(1+10^(x/400));
fplot(y, [-1000 1000])
And find the limits
>> limit(y, x, inf)
ans =
0
>> limit(y, x, -inf)
ans =
1
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