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Mathematics · L3 · Solving a Series Word Problem

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A step-by-step procedure for turning a series word problem into the right sum formula, and checking the answer at the end.

by @openstemUpdated Mathematics
📝 Read the word problem carefullyIdentify a1, and either d or rAdds a constant or multiplies by a constant?Find n and the last term anFinite terms, or infinite with |r| < 1?✅ Apply Sn = n/2 (a1 + an)Apply Sn = a1(1 − r^n) / (1 − r)♾️ Apply S = a1 / (1 − r)🔍 Check that the answer is reasonableAdds dMultiplies by rFiniter

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