The 11th term of an


First term, a = - 5


Common difference,


n = 11


As we know, nth term of an AP is


an = a + (n - 1)d


where a = first term


an is nth term


d is the common difference


a11 = - 5 + (11 - 1)(5/2)


a11 = - 5 + 25


= 20

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