## You are learning SUM in MS Excel

Adding squares of numbers (SUM with POWER)?

Absolutely, you can use the SUM function along with the POWER function in Excel to calculate the sum of squares of a range of numbers. Here's the formula:

`=SUM(POWER(range,2))`

Explanation:

- SUM: This function adds the values provided to it.

- POWER(range,2): This part calculates the square of each number within the specified range.

- range: Replace "range" with the actual cell references of the data containing the numbers you want to square.

- 2: This is the exponent, which raises each number in the range to the power of 2 (squaring them).

- The entire formula is then wrapped inside the SUM function, which adds up all the squared values from the range.

Example:

Let's say you have numbers in cells A1:A5 (A1 containing 2, A2 containing 3, and so on). To find the sum of their squares, enter the following formula in any empty cell (e.g., B6):

`=SUM(POWER(A1:A5,2))`

This formula will first square each number in A1:A5 (4, 9, etc.) and then add them all together, giving you the sum of squares.

Alternative Methods:

1. Array Formula (for advanced users): You can achieve the same result with a single formula using an array formula. However, this method requires pressing Ctrl+Shift+Enter instead of just Enter after typing the formula. The formula would be:

`=SUM((A1:A5)^2)`

2. Separate Formulas: You can also calculate squares and then use SUM in separate steps. Here's how:

- In another column (e.g., B1:B5), enter the formula `=A1^2` (or copy it down for all cells in the column). This will calculate the squares of each number in A1:A5.

- In another cell (e.g., C1), use the formula `=SUM(B1:B5)` to add up the squared values from the previous step.

These methods achieve the same result, but the first formula with SUM and POWER is the most concise and efficient way.