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Mathematics 8 Online
OpenStudy (anonymous):

give an example of an arithmetic sequence written in explicit form

OpenStudy (anonymous):

@iPwnBunnies

OpenStudy (anonymous):

well do you know what explicit form is

OpenStudy (anonymous):

an = a1 + (n – 1)d

OpenStudy (anonymous):

yes a1= starting point d=common difference n=target spot so 2,4,6,8 give for the 25th term

OpenStudy (anonymous):

what is a1? d? n?

OpenStudy (anonymous):

d = 2, n=25, a1-2

OpenStudy (anonymous):

yes can you substitute the numbers in the formula?

OpenStudy (anonymous):

\[a _{n}=a1+(n-1)d\]

OpenStudy (anonymous):

a25=2+(n-1)2

OpenStudy (anonymous):

noooo dont mess with the first n thats what you're solving for substitute n in for the second n in the equation

OpenStudy (anonymous):

an=2+(n-1)2??

OpenStudy (anonymous):

you're forgetting a term

OpenStudy (anonymous):

forgetting n

OpenStudy (anonymous):

n? but its a(n)..

OpenStudy (anonymous):

yes an=a1+(n-1)d a1=2 n=25 d=2 so that equation would be \[a _{n}=2+(25-1)2\]

OpenStudy (anonymous):

to solve that subtract 1 from 25 and multiply by 2 then add 2

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