- #1

lfdahl

Gold Member

MHB

- 749

- 0

It might still be a duplicate though ...

Find the sum of fractions

$$\frac{2}{3\cdot5}+\frac{2\cdot4}{3\cdot5\cdot7}+\frac{2\cdot4\cdot6}{3\cdot5\cdot7\cdot9}+...$$