Q29 of 202 Page 10

Two A.P.'s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is

for 1st A.P a = 8 and d= common difference = d


The nth term of an A.P is given by the formula


an= a + (n–1) d


The required difference is


= 8 + (30 – 1) d – 3 – (30 –1) d


= 5

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