1.

What will be the 99^thterm from the end of the AP 500, 489, 478, 467… – 1139?(a) 1078(b) 1123(c) 12(d) 61The question was asked in a national level competition.This key question is from Nth Term of Arithmetic Progression topic in section Arithmetic Progressions of Mathematics – Class 10

Answer»

Correct choice is (d) 61

The best explanation: In this case SINCE we have to find the 99^thterm from the END.

We will consider the first term to be -1139 and the common difference will be 11

Now, a = -1139, d = 11 and n = 99

T99 = a + (n – 1)d

T99 = -1139 + (99 – 1)11

T99 = -1139 + 1078 = -61

The value of 99^thterm from the end is 61.



Discussion

No Comment Found

Related InterviewSolutions