Question

Σ5i=1 Σ4j=1 ij

What is the value of this summation? - 50 - 20 - 150 - None of these Answers - 15
- 100

Answer 1

We can solve Σ5i=1 Σ4j=1 ij by performing nested summations. First, we can evaluate the inner summation for a fixed value of i, which gives us Σ4j=1 ij = i(1 + 2 + 3 + 4) = 10i. Then, we can perform the outer summation to get Σ5i=1 10i = 10(1+2+3+4+5) = 150. Therefore, the value of the given summation is 150.

Answer: 150

Step-by-step explanation: