how to fit sum exponential ?

hi everyone how can i do the fit for this function :

y(x)=a0+a1*exp(-x/b1)+a2*exp(-x/b2)+...+an*exp(-x/bn)

thank you

[Walter Roberson]

Duplicates https://www.mathworks.com/matlabcentral/answers/336725-how-to-fit-exponantial-function-matlab

[best16 programmer]

can you show me an example for this fitting??

[John D'Errico]

Please stop posting duplicates of the same question.