Question

if for an AP d=5 find t18-t13=?​

Answer 1

t(18) = a+(18-1)d = 17d >> (1)

t(13) = a+(13-1)d = 12d >> (2)

Subtracting (2) from (1) we get,

t(18)-t(13) = 17d-12d = 5d = 5×5 = 25

Answer 2

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