The sum of the first three terms in an arithmetic progression is -81 and the first of the next three term is -108
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Answer:
(a-d) (a) (a+d)= -81
3a=-81
a = -27
(a-d) (a) (a+d)=-108
Step-by-step explanation:
-27-d ×-27 × -27+d = -108
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