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5,8,11, ...... എന്ന ശ്രേണിയിലെ എത്രാമത്തെ പദമാണ് 2018 ?

A670

B673

C672

D675

Answer:

C. 672

Read Explanation:

ആദ്യപദം a = 5 പൊതുവ്യത്യാസം d = 8 - 5 = 3 n ആം പദം = a + (n-1)d a + (n-1)d = 2018 5 + (n -1)3 = 2018 (n -1)3 = 2018 - 5 = 2013 (n-1) = 2013/3 = 671 n = 671 + 1 = 672


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