SOLUTION: 14,a,b,c,d,81 what is the sum of a+d?
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Question 878604: 14,a,b,c,d,81 what is the sum of a+d?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
I will assume it is an arithmetic progression
an = a1 + (n - 1)d
81 = 14 + 5d
67=5d
67/5=d
13.4=d
a=14+13.4=27.4
d=81-13.4=67.6
27.4+67.6=95
sum of a and d is 95
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