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Insert the indicated number of arithmetic means 5 means between -8 and 10

Sagot :

asub n = a sub 1 + (n-1)d               a sub 2 = -8 + 3 = -5
10 = -8 + (7-1)d                              a sub 3 = -5 + 3 = -2                   
10 = -8 + 6d                                   a sub 4 = -2 + 3 = 1
10+8 = 6d                                      a sub 5 = 1 + 3 = 4
6d=18                                           a sub 6 = 4 + 3 = 7
 6    6
d=3
 Therefore, the 5 arithmetic means between -8 and 10  are -5, -2, 1, 4, 7