August 2018 1 605 Report
Ciąg (an) jest ciągiem geometrycznym, w którym a1 = 9, a suma pierwszych trzech wyrazów S3 = 7. Iloraz tego ciągu:
a. q = - 1/2
b. q = 1/3
c. q = 1/3 lub q = -2/3
d. q = -1/3 lub q = -2/3
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