MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade:
        find the sum of series 
nC1+(n+1)C2+(n+2)C3+.........+(n+r-1)Cr
please could u help me how to proceed in these
type of problems
6 years ago

Answers : (3)

Arun Kumar
IIT Delhi
askIITians Faculty
256 Points
							

Arun Kumar
IIT Delhi
Askiitians Faculty
6 years ago
Arun Kumar
IIT Delhi
askIITians Faculty
256 Points
							Little mistake in above answer

6 years ago
Saumya
13 Points
							N(C1+C2+......Cr)+( (2-1)C2+(3-1)C3......)                              SUMMATION Cr + SUMMATION rCrSUMMATION Cr is 2^nAnd to solve rCr write expansion of (1+x)^n and differentiate and then put x=1
						
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details