Middle Years
8.05 Geometric series (Enrichment)
Interactive practice questions
Find the sum of the first $5$5 terms of the geometric sequence defined by $u_1=1.415$u1=1.415 and $r=1.154$r=1.154.
Give your answer correct to two decimal places.
Easy
1min
Find the sum of the first $5$5 terms of the geometric sequence defined by $u_1=-6.384$u1=−6.384 and $r=-1.987$r=−1.987.
Give your answer correct to two decimal places.
Easy
1min
Consider the series $2+10+50$2+10+50 ...
Find the sum of the first $11$11 terms.
Easy
1min
Consider the geometric series $25+5+1$25+5+1$\ldots$…
Find the sum of the first $6$6 terms.
Easy
1min
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