Severity: Warning

Message: count(): Parameter must be an array or an object that implements Countable

Filename: controllers/calculator.php

Line Number: 37

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∑x

n= stopping point, upper limit of summation

x

i= 1 starting point, lower limit of summation

∑= summation sign

Summation notation calculator is used to find the sum of series

In this problem we need to square the value of x. Therefore we will have to take the all the 4 values to x and square it, and then add them to get the solution.

∑x

Answer = 30

In this problem we need to multiply the value of x with y and then square it. Therefore we will have to take the all the 4 values to x multiply it by y and square it.

∑x