Question

In an arithmetic sequence, if a_(1)=8 and the a_(4)=17 find the common difference.

          In an arithmetic sequence, if a_(1)=8 and the a_(4)=17 find the common difference.
        

Added by Emily J.

Elementary and Intermediate Algebra
Elementary and Intermediate Algebra
Alan S. Tussy, R. David Gustafson 5th Edition
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In an arithmetic sequence, if a_(1)=8 and the a_(4)=17 find the common difference.
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Transcript

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00:01 We have two specific terms of an arithmetic sequence and the question is to find out the common difference.
00:08 We know that for an arithmetic sequence, the n -the -term can be written as a -n is equal to a1 plus n -1 into d, where a -1 is the first term of the sequence and d is the common difference.
00:23 Here we have given the fourth term and 11th term.
00:29 So let's write this using the expression, a .n, that is a4...
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