Not able to find the solution for the following question?
Asked by vishal
| 6th Jul, 2013,
02:43: PM
Expert Answer:
take 7 common
then
7(1+11+111+....................upto n terms)
multiply and divide by 9
7/9(9+99+999+................... nterms)
7/9[(10-1)+(100-1)+(1000-1)+.................. nterms)
applying geometric series sum formula for n terms
7/9[10(10^n-1/9)-n]
7/81[10^(n+1)-9n-10]
Answered by
| 6th Jul, 2013,
05:54: PM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change