AS sequence
In an arithmetic sequence is given the difference d = -3 and a71 = 455.
a) Determine the value of a62
b) Determine the sum of 71 members.
Result
a) Determine the value of a62
b) Determine the sum of 71 members.
Result
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Tiles are stacked in rows on the trapezoidal shaped roof. At the ridge is 15 tiles and each subsequent row has one more tile than in the previous row. How many tiled is covered roof if lowermost row has 37 tiles?
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