how to numerically define 1/x^2+0.4/(60-x)^2

trying to define I= 1/x^2+0.4/(60-x)^2 numerically but says matrix dimensions must agree so incorrect use of /

help

Answer 1

[KALYAN ACHARJYA]

x=10; %define x, here is just an example
I=1/x^2+0.4/(60-x)^2 

Answer 2

[John D'Errico]

If x is a vector or array, then you are trying to compute element-wise operations. But / and ^ and * are all operators that are defined in terms of MATRIX multiplies and linear algebra.

Use the ./ .^ and .* operators for element-wise operations.

I= 1./x.^2+0.4./(60-x).^2

Ideas like this would be found in the getting started tutorials for MATLAB. Essenitally, it is always a good idea to read the manual.