Answer:
10353
Step-by-step explanation:
The given series is in arithmetic progression since the common difference is same which is 8.
To find the sum of series we can simply apply the formula'
S= n/2( first term + last term)
S is the sum and n is the number of terms
we also need to find the number of terms n
n = (last term- first term)/2 + 1
[tex]n= \frac{403-3}{8} + 1[/tex]
n= 51
[tex]s= \frac{51}{2}(3+403)[/tex]
s= 10353
