Questions

Calculate the sum of 20 terms of the series whose $\rm n^{th}$ terms is: $\rm 2n + 1$.

Calculate the sum of 20 terms of the series whose $\rm n^{th}$ terms is: $\rm n - 3$.

Calculate the sum of 20 terms of the series whose $\rm n^{th}$ terms is: $\rm 4n - 3$.

Find the sum of n terms of the series: $\rm \frac {1}{4} +\frac {1}{2} + \frac {3}{4} + 1  + \frac {5}{4} + \frac {3}{2} + \dots $

Find the sum of n terms of the series: $\rm \frac{1}{2} + 1 + \frac{3}{2} + 2 +\frac{5}{2} + 3 + \dots $

Find the sum of n terms of the series: $\rm 3 + 5 + 7 + 9 + 11 + \dots $

Find the sum of n terms of the series: $\rm 5 + 8 + 11 + 14 + 17 +\dots $

Calculate the sum of the series of natural numbers: $\rm 2 + 4 + 6 + 8 + \dots $ to $40$ terms.

Calculate the sum of the series of natural numbers: $\rm 2 + 4 + 6 + 8 + \dots $ to $25$ terms.

Calculate the sum of the series of natural numbers: $\rm 1 + 3 + 5 + 7 + \dots $ to $30$ terms.