It's 1,000,000:
<span>the sum is 1 + 3 + 5 + ... 1999999 </span>
<span>= 1 + 2 + ... + 2000000 - 2*(1 + ... + 1000000) </span>
<span>= 2000000*2000001/2 - 2*(1000000*1000001 / 2) </span>
<span>= 1000000*(2000001 - 1000001) = 1000000000000 (one million million) </span>
<span>and dividing this by one million to get the average, </span>
<span>you get one million</span>
<h3>Given : </h3>
- Radius of circle = 7 inches
<h3>To Find : </h3>
- Circumference of circle = ?
<h3>Solution :</h3>
We are given radius, r = 7 inches
We know that :
Circumference = 2πr
⟹ Circumference = 2π × 7 inches
⟹ Circumference = 14π inches
Hence, circumference of circle is 14π inches.
