A1 = -1 an = -40 n = 20
a1 = 2 an = 100 n = 50

Question

Алгебра

Anagas

7 год назад

A1 = -1 an = -40 n = 20
a1 = 2 an = 100 n = 50

ОТВЕТЫ

Pyui

Jul 4, 2019

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

5

A1 = -1 an = -40 n = 20a1 = 2 an = 100 n = 50

A1 = -1 an = -40 n = 20
a1 = 2 an = 100 n = 50