The 2nd and 8th term of an arithmetic progression are 17 and -1 respectively. What is the 14th term?
$$T_{2}$$ = a + d = 17-------(1)
$$T_{8}$$ = a + 7d = -1-------(2)
on solving (1) AND (2)
d = -3 & a = 20
$$T_{14}$$ = a + 13d = 20 + 13(-3) = -19
so the answer is option C.
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