Question

Find the sum 3 + 5 + 7 + 9 + … + 29

Answer 1

a = 3

d = 2

l = 29

.

an = a + (n-1)d

29= 3+(n-1)(2)

26=(n-1)×2

13=n-1

n=14

.

Sum =

$\frac{n}{2} (a + l)$

$= \frac{14}{2} (3 + 29)$

$= 7 \times 32$

$= 224$

Answer 2

I think the answer is 244