SOLUTION: Please help me solve this: A certain arithmetic sequence has {{{a[51]=23}}} and {{{a[101]=-127}}}. Find {{{a[1]}}}, {{{d}}}, {{{a[n]}}}, and {{{a[78]}}}

Question 323764: Please help me solve this: A certain arithmetic sequence has
and . Find , , , and
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!
Please help me solve this: A certain arithmetic sequence has
and . Find , , , and


Use  

Substitute , 





Substitute , 






So we have this system of equations:



Solve that system of equation by substitution or addition.
If you don't know how post again asking how.  The
solution is , ""=""}}}

Therefore substituting those in








Substitute n=78





Edwin

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