WAEC 2019 · Paper 1 · Q9

Sequences & series (AP, GP)

If 6, $P$ and 14 are consecutive terms in an arithmetic progression, find the value of $P$ .

Worked solution (try it first)

In an A.P. the middle term is the average of its neighbours.
So $P = \frac{6 + 14}{2} = 10$ , option B.

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