February 2019 0 286 Report
Dla jakiej wartości parametru k liczby: a1, a2, a3 są kolejnymi wyrazami ciągu arytmetycznego(an)?
a) a1=3, a2=k+1, a3=3k−6
b) a1= 2k, a2= k+3 a3= 1/2k
c) a1=1, a2= k^{2} a3=  k^{2} +2k+2
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