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tlist = Table[i, {i, 1, 10}]

tlist:{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

f = E^(-((2 t)/T));

Sum[f, {t, {tlist[[i]], {i, 1, 8}}}]

How to calculate Sum of a function over a list?

One way to do this is by defining f[t_]:= E^(-((2 t)/T)); Is there a way to do it in any other manner. Because I have to do this for various functions with a higher level of complexity.

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Sum[f, {t, tlist}]

 E^(-20/T) + E^(-18/T) + E^(-16/T) + E^(-14/T) + E^(-12/T) + E^(-10/ T) + 
  E^(-8/T) + E^(-6/T) + E^(-4/T) + E^(-2/T)
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  • $\begingroup$ lol thanks. Can you please close this question? $\endgroup$ – tabi_k Sep 10 '20 at 6:58

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