January 2019 0 40 Report
Wyznacz wyraz pierwszy i iloraz ciągu geometrycznego an jeśli:
a) a1+a3= 39 i a2+a4= 26
b) a1+a3= -5 i a2+a4= 10
c) a5-a1= 80 i a4-a2= 24
d) a5-a1= 75 i a4+a2= -50
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