Which of the following expresses the term of a geometric progression whose first term…

MATHEMATICS · Single correct · CBSE · Mathematics · Sequences and Series · Sequences and Series

Problem

Which of the following expresses the

n^{\text{th}}

term of a geometric progression whose first term is

a

and common ratio

r

? (a)

a_n = ar^{n}

(b)

a_n = \dfrac{a}{r^{n-1}}

(c)

a_n = ar^{n-1}

(d)

a_n = a + (n-1)r