For the sequence an = 4n + 5 how do you find the first five terms?

1 Answer
Aug 31, 2015

The first five terms are
#color(blue)(9,13,17,21,25#

Explanation:

#a_n=4n+5#

We can find terms #1 # to #5# by substituting #n# respectively in the expression.

#a_n=4n+5#

So,
#a_color(blue)(1) = 4 *color(blue)((1)) +5=9#

#a_color(blue)(2 ) = 4 *color(blue)((2)) +5=13#

#a_color(blue)(3) = 4 *color(blue)((3)) +5 =17#

#a_color(blue)(4) =4 *color(blue)((4)) +5= 21#

#a_color(blue)(4) =4 *color(blue)((5)) +5= 25#