Anonymous function to calculate a sum
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I have to write an anonymous function which calculates the following sum for a given real number x and a positive integer:
x + (x^2)/2! + (x^4)/4! + ... + (x^2n)/(2n)!
I started off with this:
ch = @(x,n) ...
But I don't know how I can calculate the sum with only the anonymous function.