Question

Let f (x) = 2x where the domain is the set of real numbers. What is f(R)?

Answer 1

Answer:

2R

Step-by-step explanation:

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Answer 2

Given: $f(x)=2x$

The domain = the set of real numbers in the given condition.

We have to find the value of $f(R)=?$

As we know that $f\left(\frac{y}{2}\right)=y$

The domain = the set of real numbers   -----(Given)

So,

=> $f(\mathbb{R})=\mathbb{R} \text { since } f\left(\frac{y}{2}\right)=y$

Hence, $f(\mathbb{R})=\mathbb{R} \text$