Finding the Nth Term

R is the common ratio. If the common ratio is not known the common ratio can be calculated by finding the ratio of any term by its preceding term.

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Answers can be checked individually or all at once.

. A simple to use lesson starter for use on the interactive whiteboard. A is the first term. A n ar n-1.

To find the nth term in the infinite GP we require the first term and the common ratio. The formula for the nth term of the GP is.

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