Объяснение:
c7=c4•q^3
-320=40•q^3
q^3=-8
q=-2
c4=c1•q^3
40=c1•(-8)
c1=-5
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Объяснение:
c7=c4•q^3
-320=40•q^3
q^3=-8
q=-2
c4=c1•q^3
40=c1•(-8)
c1=-5