Asked by Okafor providence MC
                The first and last term of AP are 79and -5 if the sun is 814 find 
The number of terms on the AP
The common difference
            
            
        The number of terms on the AP
The common difference
Answers
                    Answered by
            mathhelper
            
    sum(n) = n(first + last)/2
814 = n(79-5)/2
814 = 37n
n = 22
term(22) = a + 21d
-5 = 79 + 21d
d = -4
    
814 = n(79-5)/2
814 = 37n
n = 22
term(22) = a + 21d
-5 = 79 + 21d
d = -4
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