Question

How do you find the sum given `Sigma 1/j` from j=3 to 5?

Answer 1

`sum_(j=3)^5 1/j = 47/30`

Explanation:

There are only a couple of terms, so let us just write out the sum in full as follows:

`sum_(j=3)^5 1/j = 1/3 + 1/4 + 1/5`
`:. sum_(j=3)^5 1/j = (20 + 15 + 12)/60`
`:. sum_(j=3)^5 1/j = 47/30`