No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
−(n−1)!
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
n!−1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
(−1)n−1(n−1)!
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is B−(n−1)! y=(1−x)(2−x)...(n−x)⇒dydx=−[(2−x)...(n−x)+(1−x)(3−x)...(n−x)+...(1−x)(2−x)...(n−1−x)] Putting x=1 dydx=−(1)(2)...(n−1)⇒dydx=−(n−1)!