Answer: 1482
Step-by-step explanation:
Each number in the series is greater than the previous number by 4.
(n/2) * (S + (S + ((n-1) * 4)))
where:
S = 7
n = 26
(26/2)× (7+(7+((26-1) ×4)))
(13)× (7+(7+(25)×4)
13×114
herefore, the solution is 13 * 114 = 1,482
