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Find the middle term of an AP 213 205 197 .......37 |
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Answer» an equals to a + (n-1)d37 equals to 213+(n-1)-837-213 equals to(n-1)-8-176/-8 equals to n-122+1equals to n23 equals to n(23 is odd)so middle term equals to n+1/223+1/2 equals to12so 12th term is middle terman equal to a+(n-1)da12 equal to 213+(12-1)-8a12 equal to 213-88a12 equal to 125(sorry for equals to sign) a is 213, d is 205-213(-8), an is 37an equals to |
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