Write the following sum using summation notation -2/5+3/6-4/711/14

Step-by-step explanation:

Given:

To write: the given expression using summation notation

Solution:

Summation notation helps to write a long sum as a single expression.

In the summation notation, the variable is called the index of summation.

Let denote a set of n numbers.

Then in summation notation,

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

1. 34

2. 268

3. x=14.4

step-by-step explanation: