Do you mean
f(x) = (5^x)*(sech x), or
f(x) = 5^(x sech x) ?
In the first case, use the differentiation rule for the product of two functions. The second can be solved using the rule for the function of a function
f(t)=5^x sechx
f'(x)=?
2 answers
(5^x)*(sech x)