find the sum of the arithmetic sequence with first term 12 last term 90 and 14 terms

Question

find the sum of the arithmetic sequence with first term 12 last term 90 and 14 terms ​

BrainlyModIsBusy · Answer

714This is an arithmetic sequence, so we can use the formula for the sum of n terms:S = (n/2) × (first term + last term)Step-by-stepFirst term (a₁) = 12Last term (a₁₄) = 90Number of terms (n) = 14SolutionS = (14 ÷ 2) × (12 + 90)S = 7 × 102S = 714

Answered by BrainlyModIsBusy | 2025-07-24

find the sum of the arithmetic sequence with first term 12 last term 90 and 14 terms ​

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