Nilai dari notasi sigama 5k=1(k+2)
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Jawab:
nilai notasi sigma
∑₁⁵ (k+2) =
sub k = 1 , 2 , 3, 4, 5
= (1 +2) + (2 +2) + (3 +2)+ (4 + 2) + (5+2)
= 3 + 4 + 5 + 6 + 7
= 25
atau
∑₁⁵ (k+2) =
= ∑₁⁵ (k) + ∑₁⁵(2)
= (1 + 2 + 3 + 4 + 5) + 2(5)
= 15 + 10
= 25
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