a1=-1 an=-40 n=20a1=2 an=100 n=50. Created by segidabv. algebra-ru

a1=-1 an=-40 n=20a1=2 an=100 n=50...

July 2022 1 3 Report

a1=-1 an=-40 n=20
a1=2 an=100 n=50

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0Liza0 An=a1+d*(n-1)
________________
1). -40=-1+d*(20-1)
-40=-1+19d
19d=-40+1
19d=-39
d=-39\19
________________
2) 100=2+d*(50-1)
100=2+49d
49d=100-2
49d=98
d=98\49
d=2

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