Evaluate the following integrals as a limit of sums:
Formula used:
where,
Here, a = 0 and b = 3
Therefore,
⇒ nh = 3
Let,
Here, f(x) = x + 4 and a = 0
Now, By putting x = 0 in f(x) we get,
f(0) = 0 + 4 = 4
Similarly, f(h) = h + 4
In this series, 4 is getting added n times
Now take h common in remaining series
Put,
Since,