an=a1+d(n-1)
29= 5+3(n-1)
24=3(n-1)
n-1=8
n=9
9й член прогрессии
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an=a1+d(n-1)
29= 5+3(n-1)
24=3(n-1)
n-1=8
n=9
9й член прогрессии