Asked by Aphiwe

How to fill in missing numbers eg -85---59---20
Answered by Reiny
assuming it is an AS, and each dash is a missing term ...
a+d = 85
a+5d=59
subtract them:
4d = -26
d = -13/2
a-13/2 = 85
a = 183/2
then term10 should be 20
a + 9d = 33 , not 20

so it is not an arithmetic sequence, what is it??
Is each dash a missing term??
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