# How do you find #a_43# given 5, 9, 13, 17,...?

##### 1 Answer

Dec 13, 2016

See explanation.

#### Explanation:

From the given terms you see that the first term of the sequence is

#a_n=a_1+(n-1)xxd#

If we substitute the given data we get:

Answer: **The 43rd term is #a_43=173#**