a(n) = a1 + d*(n - 1)
a1 = 1.5
d = -0.4
a5 = a1 +4d = 1.5 - 0.4*4 = -0.1
a26 = a1 + 25d = 1.5 - 0.4*25 = -8.5
a32 = a1 + 31d = 1.5 - 0.4*31 = 1.5 - 12.4 = -10.9
a5=a1+4d=1.5+4*(-0.4)=1.5-1.6=-0.1
a26=a1+25d=1.5+25*(-0.4)=1.5-10=-8.5
a32=a1+31d=1.5+31(-0.4)=1.5-12.4=-10.9
Объяснение:
