Disha Expert Team Solutions for Chapter: Sequence and Series, Exercise 1: Exercise

Find the number of terms in the A.P. $22, 28, 34, .......616$?

Find the sum of the first hundred even natural numbers divisible by $5$?

How many terms of the series $20 + 16 + 12 + .......$ amounts to $48$?

What is the sum of $100$terms of the series $1-2+3-4+5-6+......?$

Complete the series: $5, 19, 41, 71, ?, 155$.

In a geometric progression the sum of the first and the last term is $66$and the product of the second and the last but one term is $128$. Determine the first term of the series?

Find the sum of all odd numbers of four digits which are divisible by $9$.

The sum of the infinite series, $\frac{1}{1\times 4}+\frac{1}{4\times 7}+\frac{1}{7\times 10}+....\infty$ is equal to