Oblicz wyrazy a₁ i a₈ ciągu arytmetycznego (an) gdy a₅= 3 r=2
an=a1+(n-1)*2
a5=a1+(5-1) *2
a1=-5
a8=-5+(8-1)*2
a8=9
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an=a1+(n-1)*2
a5=a1+(5-1) *2
a1=-5
a8=-5+(8-1)*2
a8=9