iGCSE (2021 Edition)
9.04 Arithmetic series
Interactive practice questions
Find the sum of the first $10$10 terms of the arithmetic sequence defined by $a=6$a=6 and $d=3$d=3.
Easy
2min
Find the sum of the first $10$10 terms of the arithmetic sequence defined by $a=-18$a=−18 and $d=4$d=4.
Easy
2min
Find the sum of the first $15$15 terms in the arithmetic sequence $2+6+10$2+6+10 $+$+ ...
Easy
2min
Evaluate the following sum up to the first $15$15 terms:
$-17-15-13$−17−15−13 $-$− ...
Easy
2min
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