Write the sum to n terms of a series whose rth term is: r + 2r
The general term be = i + 2i
= Sum of series
We know by property that:
∑axn + bxn - 1 + cxn - 2…….d0=a∑xn + b∑xn - 1 + c∑xn - 2…….. + d0∑1
Thus
Substituting the above value
Thus
3
Write the sum to n terms of a series whose rth term is: r + 2r
The general term be = i + 2i
= Sum of series
We know by property that:
∑axn + bxn - 1 + cxn - 2…….d0=a∑xn + b∑xn - 1 + c∑xn - 2…….. + d0∑1
Thus
Substituting the above value
Thus