The sum of the first 26 terms with common difference 4 is 1482.
What is an arithmetic sequence?
An arithmetic sequence has a first term (a) and the common difference.
From the sequence:
a = 7;
common difference (d) = 11 - 7 = 4
The sum of the first 26 terms is:
[tex]S_{26}=\frac{n}{2}(2a+(n-1)d)=\frac{26}{2}(2(7)+(26-1)4= 1482[/tex]
The sum of the first 26 terms with common difference 4 is 1482.
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