The sum of the arithmetic sequence given by <span>an = 0.05(n – 1) – 0.6 will be given by: a1=0.05(1-1)-0.6=-0.6 a2=0.05(2-1)-0.6=-0.55 a3=0.05(3-1)-0.6=-0.5 a4=0.05(4-1)-0.6=-0.45 a5=0.05(5-1)-0.6=-0.4 thus the summation will be: -0.6+(-0.55)+(-0.5)+(-0.45)+(-0.4) =-2.5 hence S5=-2.5</span>
