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Stage 4 - Stage 5

Geometric Series

Interactive practice questions

Consider the series $5+10+20$5+10+20 ...

Find the sum of the first $12$12 terms.

Easy
3min

Find the sum of the first $5$5 terms of the geometric sequence defined by $a=2.187$a=2.187 and $r=1.134$r=1.134.

Give your answer correct to two decimal places.

Easy
2min

Find the sum of the first $5$5 terms of the geometric sequence defined by $a=-4.186$a=4.186 and $r=-2.848$r=2.848.

Give your answer correct to two decimal places.

Easy
2min

Consider the geometric series $64+16+4$64+16+4$\ldots$

Find the sum of the first $7$7 terms.

Easy
2min
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