Question 189875
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The general formula for the nth term of an arithmetic sequence is:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  a_n = a_1 + (n - 1)d]


Where *[tex \LARGE  a_1] is the first term and *[tex \LARGE  d] is the common difference.


Figure out how much you add to each of the terms to get from one to the next in your given sequence, that is your common difference.  The first term is -3.  Substitute these values into the general formula to create your specific formula.


Then substitute 20 for *[tex \LARGE n] in the formula and do the arithmetic to derive the value of *[tex \LARGE  a_{20}]


John
*[tex \LARGE e^{i\pi} + 1 = 0]
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