The first term of an arithmetic sequence is -3 and the fifteenth term is 53. what is the common difference of the sequence? 14/13 25/7 4

The common difference of the arithmetic sequence is:

                                       4

We kn ow that if the first term of an arithmetic sequence is a and d is the common difference of the sequence then the nth term of the sequence is given by the formula:

Here we are given:

and

Now using the value of a we have:

∠cbe and ∠deb are same-side interior angles.

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