Question

1. Find the sum of the series
15
∑ (2n-1)
n-1.
Show your work.​

Answer 1

`\\ \rm\Rrightarrow \sum^(15)_(n=1)2n-1`

`\\ \rm\Rrightarrow 2(1)-1+2(2)-1\dots+2(15)-1`

`\\ \rm\Rrightarrow 1,3,5\dots 29`

Sum of first 15 odd nos

• n²
• 15²
• 225