Question

Which term of the series 84 + 74 + .....is 0 ?
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Answer 1

Let 0 =
`a_(n)`, 84 = a, 74 =
`a_(2)`, and d, which is the difference between consecutive terms, be 74 - 84 = -10.

`a_(n)` = a + (n-1)d

0 = 84 + (n-1)-10

0 = 84 - 10n + 10

0 = 94 - 10n

10n = 94

n = 9.4

The equation gives us the answer that 0 is the 9.4th term of the equation. But since n is always a natural number for a number in the series, we can say that 0 is not a part of this series.