1.

If the nth term of an arthmetic progression a n =24-3n then its 2n term is

Answer» an = 24 - 3nWe need the second term and therefore :n = 2We substitute this value of n in the formula to get :a2 = 24 - 3 × 2= 24 - 6 = 18The second term is thus 18.
18


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