Question

Calcule a soma. O total de latas empilhadas é:(1,3,5,...930

Answer 1

An: a1 + (n-1) × r

a930: 1 + (930-1) × 2

a930: 1 + 929 × 2

a930: 1 + 1858

a930: 1859

Sn: n × (a1 + an)

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2

S930: 930 × (1 + 1859)

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2

S930: 930 × 1900

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2

S930: 1.767.000

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2

S930: 883.500