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OpenStudy (anonymous):
what is the simple formula for the nth term of the following arithmetic sequence 12,16,20,24,28,...
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OpenStudy (anonymous):
\[a_1+(n-1)\times d\] you need only \(a_1\) and \(d\) the\(n\) stays in the formula
OpenStudy (anonymous):
is a[1]=12 and d=4
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
12+(n-1)*4 and it gave me 4(n+2)
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