Posted by
**Remy** on
.

When the first n positive integers are added together, their sum is given by

1/2n(n+1)

Find the value of n for which the sum is 105..

Can you show me a step by step please?

Thursday

March 30, 2017
Posted by
**Remy** on
.

When the first n positive integers are added together, their sum is given by

1/2n(n+1)

Find the value of n for which the sum is 105..

Can you show me a step by step please?

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