Question

Write the following in summation notation :5+7+9+......+73+75

Answer 1

You need to find a formula for these numbers using N, where N is the position in the list.
I would start with N+4; it works for the first one, but not the second...
So try 2N+1... no luck, and not even closer...
Can you think of one?

Answer 2

\[\sum_{i=2}^{n}2i+1\]

Answer 3

does the sequence continue? or stop at 75?

Answer 4

\[\sum_{i=2}^{75}2i+1\]

Answer 5

\[\sum_{n=2}^{37}2n+1\]

Answer 6

you need to stop it at 75 = 2i+1

Answer 7

I think it should be something like the
2n + 1 = 75
n = 37.

Answer 8

it stops at 75