Question

Given that s = n/2 (2a + (n - 1) d), a = 3, d = 4, and n = 10. Find the value of s. Please I need help. It's urgent.

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Answer 1

s = 210

Explanation:

s = n/2(2a+(n-1)d)

s = 10/2(2(3)+(10-1)4)

s = 5(6+(9)4)

s = 5(6+36)

s = 5(42)

s= 210

Therefore, s = 210

Answer 2

The answer is obviously 210.