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a1=2 d=3

an=a1+(n-1)d

i.e. 2,5,8,11,14,17....

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โˆ™ 2010-03-30 19:56:48
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Q: The sum of the first 5 terms of an arithmetic sequence is 40 and the sum of its first ten terms is 155what is this arithmetic sequence?
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What is the type of sequence where the terms in the sequence are found by adding the same number each time?

That's an arithmetic sequence.


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The sequence is arithmetic if the difference between every two consecutive terms is always the same.


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No. An 'arithmetic' sequence is defined as one with a common difference.A sequence with a common ratio is a geometricone.


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A sequence in which the terms change by the same amount each time?

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What is it where you find terms by adding the common difference to the previous terms?

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A sequence in which the difference between any two consecutive terms is the same?

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What is first four terms of the arithmetic sequence with common difference of 3 and a first term of -26?

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What is the sum of the first 12 terms of the arithmetic sequence?

The sum of the first 12 terms of an arithmetic sequence is: sum = (n/2)(2a + (n - 1)d) = (12/2)(2a + (12 - 1)d) = 6(2a + 11d) = 12a + 66d where a is the first term and d is the common difference.


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If a equals 4 and d equals -2 what is the first four terms of the arithmetic sequence?

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What is a sequence whose terms differ by the same nonzero number d called thecommon difference?

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What is the difference between an arithmetic series and a geometric series?

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We need help with answering this question.


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What is the common difference for an arithmetic sequence in which the terms are decreasing?

From the information given, all that can be said is that it will be a negative number.


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Which sequence? Oh, that one! The first three terms are 1, 2 and 72.