# Progressions Question 1f

**1. Which of the following sequences appear to be an arithmetic
progression? State the first term and the common difference.**

** f)**

** f)**

**Answer:**

** f) No**

f) 1, 3, 9, 27, . . .

**Solution:**

f) No

**
Definition: **A sequence is said to be an
**arithmetic
progression **
if successive terms differ by the same amount which is called
the
**common difference**
. The nth term of an arithmetic progression
may be written as:

Where the nth term,

the first term,

the number of terms,

the common difference.