Question 387770
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Hi,         
Aritmetic Sequence 8,11,14,17...
finding the explicit formula
 {{{a[n]=a[1]+(n-1)*d}}}  In this example, d = 3
 {{{a[n]= 8 +(n-1)*3}}} 
finding the 40th term
 {{{a[40]= 8 +(39)*3 = 8 + 117 = 125}}}