а10=25
а=25/10
а=5/2
An = A1 + (n - 1)·d
A10 = 10 + (10-1)·(25) = 235
а26=-13
а=-13/26
а=-1/2
A10 = 26 + (10-1)·(-13) = -91
а10=25
а=25/10
а=5/2
An = A1 + (n - 1)·d
A10 = 10 + (10-1)·(25) = 235
а26=-13
а=-13/26
а=-1/2
An = A1 + (n - 1)·d
A10 = 26 + (10-1)·(-13) = -91