How do you write the first five terms of the sequence #a_n=3n+1#?

2 Answers
Jim G.
Aug 10, 2018

#4,7,10,13,16#

Explanation:

#"to obtain the first 5 terms substitute "n=1,2,3,4,5"#
#"into "a_n#

#a_1=(3xx1)+1=3+1=4#

#a_2=(3xx2)+1=6+1=7#

#a_3=(3xx3)+1=9+1=10#

#a_4=(3xx4)+1=12+1=13#

#a_5=(3xx5)+1=15+1=16#

maganbhai P.
Aug 10, 2018

The first five terms are # :4,7,10,13,16.#

Explanation:

Here ,

#a_n=3n+1#

#n=1=>a_1=3(1)+1=3+1=4#

#n=2=>a_2=3(2)+1=6+1=7#

#n=3=>a_3=3(3)+1=9+1=10#

#n=4=>a_4=3(4)+1=12+1=13#

#n=5=>a_5=3(5)+1=15+1=16#

Hence ,the first five terms are # :4,7,10,13,16.#

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