How do you write an equation for the nth term of the arithmetic sequence: 7, 16, 25, 34, ...?

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Answer 1 · 2018-03-06T12:21:35

#9n-2#

#7,16,25,34,...#

here is one method

we note that each term of the sequence is obtained by adding #9# to the previous term

tus

#7, (7+9), (7+ 2xx9),(7+3xx9),...#

so teh nth term

is #7+ (n-1)xx9#

or
#n^(th)=7+9(n-1)#

#=7+9n-9=9n-2#