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Find the an and a10, in the arithmetic sequence
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Find the an and a10, in the arithmetic sequence

Find the an and a10, in the arithmetic sequence-example-1
User Northener
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\text{First term, a = 10}\\\\\text{Common difference,}~ d = 0-10 =-10\\\\\\\text{Nth term,}~ a_n = a+(n-1)d\\\\~~~~~~~~~~~~~~~~~~= 10+(n-1)(-10)\\\\~~~~~~~~~~~~~~~~~~= 10-10n+10\\\\~~~~~~~~~~~~~~~~~~= 20-10n\\\\\text{10th term} ,~ a_(10) = 20 -10(10) = 20 -100=-80

User Wittrup
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