Definite IntegrationHard
Question
The value of 
dx equals
dx equals Options
A.n
B.n!
C.(n + 1)!
D.n.n!
Solution
I = 
dx
Let ln
(x + r) = t ⇒ 
dx = dt
I =
dt = [et]
= (n + 1)! - n! = n. n!
dxLet ln
(x + r) = t ⇒ dx = dtI =
dt = [et]= (n + 1)! - n! = n. n!
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