## How do you find F 1?

Finding the Inverse of a Function

- First, replace f(x) with y .
- Replace every x with a y and replace every y with an x .
- Solve the equation from Step 2 for y .
- Replace y with f−1(x) f − 1 ( x ) .
- Verify your work by checking that (f∘f−1)(x)=x ( f ∘ f − 1 ) ( x ) = x and (f−1∘f)(x)=x ( f − 1 ∘ f ) ( x ) = x are both true.

### Why do we evaluate text?

Answer: An effective evaluation should explore how the writer has achieved their intention, its impact on the reader and how effectively the writer has achieved this. think about how successfully the writer of the text achieves their intention.

**How do you find the expression of a function?**

What method is used to find the expression of a function?

- Calculate f(0) then show that f is an even function.
- Let x∈R. Prove that ∀n∈Z,f(nx)=n2f(x).
- Let a=f(1). Prove that ∀r∈Q,f(r)=r2a.
- Deduce the expression of f∈R.

**Why is it important to distinguish concepts about opinion and assertion?**

Answer: To evaluate an argument, you need to understand the writer’s claim and the evidence that supports it. Distinguishing between a factual claim and a commonplace assertion will help you determine whether the evidence is adequate. We can determine whether it is true by researching the evidence.

## What is the main difference between evaluating a function and solving a function?

As I move into functions, this framework is helpful for understanding that evaluating a function must have one and only one answer, whereas solving a function given an output can have more than one input.

### What are the qualifying words to identify opinions from truth?

Words to Identify Opinions: Qualifiers (all, always, likely, never, might, seem, possibly, probably, should, etc.)

**What are the steps in evaluating a function?**

To evaluate a function, substitute the input (the given number or expression) for the function’s variable (place holder, x). Replace the x with the number or expression. 1. Given the function f (x) = 3x – 5, find f (4).

**What are function notes?**

A function is a relation in which each member of the domain is paired with exactly one element of the range. The domain and range of this function are both the set of real numbers, and the relation is a function because for any value of x there is a unique value of y. Figure 3. A graph of the linear equation y = x + 1.

## What skills do you need to do when evaluating a text?

Some General Criteria for Evaluating Texts

- What is the author’s aim?
- To what extent has this aim been achieved?
- What does this text add to the body of knowledge? This could be in terms of theory, data and/or practical application.
- What relationship does it bear to other works in the field?
- What is missing/not stated?
- Is this a problem?

### What do you need to evaluate a text?

An effective evaluation should explore how the writer has achieved their intention, its impact on the reader and how effectively the writer has achieved this. think about how successfully the writer of the text achieves their intention.

**How do you simplify the difference quotient?**

The steps we take to find the difference quotient are as follows:

- Plug x + h into the function f and simplify to find f(x + h).
- Now that you have f(x + h), find f(x + h) – f(x) by plugging in f(x + h) and f(x) and simplifying.
- Plug your result from step 2 in for the numerator in the difference quotient and simplify.