Question 89

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

Solution

$$T_{2}$$ = a + d = 8-------(1)

$$T_{6}$$ = a + 5d = 20-------(2)

on solving (1) AND (2)

d = 3 & a = 5

$$T_{20}$$ = a + 19d = 5 + 19(3) = 62

So the answer is option C.

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