Interactive practice questions
Consider the series $8+1+\frac{1}{8}$8+1+18$\dots$…
Find the sum of the first $7$7 terms. Round your answer to three decimal places if necessary.
Easy
2min
Consider the series $1-\frac{1}{2}+\frac{1}{4}-\frac{1}{8}+\text{. . .}+\frac{1}{1024}$1−12+14−18+. . .+11024.
Which of the following expresses the series in the form $\sum_{k=1}^{\editable{}}\editable{}$∑k=1?
Medium
3min
Consider the series $1+2+4$1+2+4 ...
Find the sum of the first $10$10 terms.
Easy
1min
Find the sum of the first $5$5 terms of the geometric sequence defined by $t_1=5.723$t1=5.723 and $r=1.921$r=1.921.
Give your answer correct to two decimal places.
Easy
1min
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