Function Notation: CCSS.Math.Content.HSF-IF.A.2 - Common Core: High School - Functions

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Given the following function , calculate .

Assume is always positive.

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This question is testing the knowledge and skills of calculating a function value. Similar to domain and range, calculating the function value requires the application of input values into the function to find the output value. In other words, evaluating a function at a particular value results in the function value; which is another way of saying function value is the output.

For the purpose of Common Core Standards, function notation and evaluation fall within the Cluster A of the function and use of function notation concept (CCSS.Math.content.HSF-IF.A).

Knowing the standard and the concept for which it relates to, we can now do the step-by-step process to solve the problem in question.

Step 1: Identify the input value.

Since the function is in the form and the question asks to calculate we know that the input value is three.

Step 2: Given the function, input the desired value.

In step one the input value of three was found. Now substitute 3 in for every in the function.

Step 3: Answer the question.

The answer is