State the general formula for the th term of an arithmetic progression whose first…

MATHEMATICS · Single correct · A Level · Mathematics · Sequences and series · Sequences and series

Problem

State the general formula for the

n

th term

a_n

of an arithmetic progression whose first term is

a

and common difference is

d

. (a)

a_n = a + nd

(b)

a_n = a + \dfrac{nd}{2}

(c)

a_n = a + (n-1)d

(d)

a_n = (n-1)(a+d)