SOLUTION: Given that A 5 = 46 and A7 = 60 are the 5th and 7th terms in a arithmetic sequence find

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Question 932491: Given that A 5 = 46 and A7 = 60 are the 5th and 7th terms in a arithmetic sequence find
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!




Use substitution of 46+d for a6 in 2nd equation






Then use formula

 with n=5 and a5=46







So 

 becomes:









You didn't say what you wanted to find but you can use
that formula to find any term.

Or you ccan find a formula to use for the sum of any
numer of terms:











Edwin
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