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The question asks which function composition can result in the expression \( 3 - 6x \), given that \( f(x) = 2x - 1 \) and \( g(x) = 2 - 3x \).

### Solution:

1. **Composition of Functions:**
   - The notation \( f \circ g \) or \( f(g(x)) \) means to substitute \( g(x) \) into \( f(x) \).
   - Similarly, \( g \circ f \) or \( g(f(x)) \) means substituting \( f(x) \) into \( g(x) \).

2. **Check \( f(g(x)) \):**
   - We know \( g(x) = 2 - 3x \).
   - Substituting \( g(x) \) into \( f(x) \), we get:
     \[
     f(g(x)) = 2(2 - 3x) - 1 = 4 - 6x - 1 = 3 - 6x
     \]
   So, \( f(g(x)) = 3 - 6x \).

   This matches the expression we are looking for.

### Conclusion:
The correct composition is \( f \circ g \), which is option **E**.

Would you like any further details on function composition? Here are some related questions you might find helpful:

1. What are the properties of function compositions?
2. How can you reverse a function composition?
3. What happens when you compose a function with its inverse?
4. How do you prove two functions are inverses?
5. What are the applications of function composition in calculus?

**Tip:** When composing functions, make sure to substitute the entire second function wherever the variable appears in the first function.

Jika ditentukan bahwa f(x)=2x-1 dan g(x)=2-3x, maka 3-6x dapat diperoleh dari komposisi fungsi ......

Learn how to solve a function composition problem involving f(x)=2x-1 and g(x)=2-3x to obtain the expression 3-6x. This problem covers key concepts in algebra and function composition, suitable for students in Grades 10-12.

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