Excercise 13A

### prove that

### . Find the sum of the series: 5 + 7 + 13 + 31 + 85 + …. To n terms

Answer : In the given question we need to find the sum of the series. For that, first, we need to find the nth term of the series so that we can use summation of the series with standard...

### Find the sum of the series: 1 + 5 + 12 + 22 + 35 +… to n terms

Answer : In the given question we need to find the sum of the series. For that, first, we need to find the nth term of the series so that we can use summation of the series with standard identities...