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6 August, 19:17

How do I find the 25th term of the arithmetic sequence - 39, - 31, - 23, - 15, ...

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  1. 6 August, 19:46
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    Every time you subtract 8 to get to the next number. So just multiply 8x25 to get 200 and then add 200 instead of subtract (because it's a negative number) to - 15 and you get the 25th number, which is 185.
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