Question

The sum of the series 3 ½ + 7 + 10 ½ + 14 + …. To 17 terms is

Answer 1

Step-by-step explanation:

try using the sum of n terms for AP

sum= n(2a+(n-1)d)÷2

n= no. of terms

a=first term

d=common diff.

Answer 2

Answer:

2023/4

Step-by-step explanation:

7/2+7+21/2+14+...........(17 terms)

a=7/2

d=7/2

n=17

Sum of A.P (Sn)=(n/2)(2a+(n-1)d)

Sn=(17/2)((2*7/2)+(17-1)*(7/2))

Sn=(17/2)*(7/2+112/2)

Sn=(17/2)*(119/2)

Sn=2023/4