Formula used:

where,

Here, a = 0 and b = 2

Therefore,

Let,

Here, f(x) = e^x and a = 0

Now, by putting x = 0 in f(x) we get,

f(0) = e⁰ = 1

f(h)

= (e)^h

= e^h

Similarly, f(2h)

= e^2h

Sum of n terms of a G.P. is given by,

Therefore,