Register
Sum of 1/2*3 +1/3*4 +1/4*5 ..1/99*100
203k views
14 votes
Sum of 1/2*3 +1/3*4 +1/4*5 ..1/99*100

User Sinkmanu
by
3.5k points

1 Answer

2 votes

Answer:

11∗2+13∗4+15∗6+⋯+199∗100=?

=(1−12)+(13−14)+(15−16)+⋯+(199−1100)

=(1+13+15+17+⋯+199)−(12+14+16+⋯+1100)

=(1+13+15+17+⋯+199)−12(1+12+13+⋯+150)

=∑k=15012k−1−∑k=15012k

Continue further.

User Cbare
by
4.3k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

4.4m questions

5.6m answers

Other Questions

Before beginning voice lessons, Aubrey already knew how to sing 357 pieces, and she expects to learn 2 new pieces during each week of lessons. After 78 weeks of voice lessons, how many pieces will Aubrey
A study was completed in Florida. In southern Florida, the study involved 3,000 patients; 54% of them experienced flulike symptoms during the same month. The study had a margin of error of 1.8%. What does
Please answer asap.......... ...
Can someone help me plz I have to Turn 27/9 in simplest
What value of x makes the following true? 2(x + 10) = 4( 2x - 1)
Link Copied!