Infinite Geometric Sequence Sum

00:00 3 marks

Consider a geometric sequence with a first term $a = 10$ and a common ratio $r = 0.8$. Calculate the sum to infinity of this sequence.

Hint Hint

Hint

Recall that the sum to infinity of a convergent geometric sequence is given by $S_\infty = \frac{a}{1 – r}$.

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Complete Answer

$50$

Mark Scheme Mark Scheme

Answer Explanation Answer Explanation

Examiner Tips Examiner Tips

Common Errors Common Errors

Focus Focus

Formula Booklet

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