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Learn the toughest concepts covered in Beginning Algebra with step-by-step video tutorials and practice problems by world-class tutors 

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In this Python course you will learn how to : think like a programmer, solve mini practice problems in Python and build three small games. 
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An arithmetic sequence has a7=50a_7 = 50 and a1=8a_1 = 8. Write the explicit formula for ana_n.

An arithmetic sequence has $a sub 7 equals 50$ and $a sub 1 equals 8$ . Write the explicit formula for $a_{n}$ .