A geometric series with first term $a$ and common ratio $r$ is —

Question

Accepted Answer

$a + ar + ar^{2} + ar^{3} + \cdots$

Answer

$a + (a + r) + (a + 2r) + \cdots$

Answer

$a + a^{2} + a^{3} + \cdots$

Answer

$r + ra + ra^{2} + \cdots$

A geometric series with first term aaa and common ratio rrr is —