MHB State the differences between an expression and its simplified equivalent.

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The primary difference between an expression and its simplified equivalent lies in the presence of removable singularities, as illustrated by the example f(x) = x/x, which simplifies to f(x) = 1 for x ≠ 0. The simplified expression is generally considered simpler and more straightforward. However, understanding these differences often requires context from specific courses or textbooks that define terms like "expression," "simplified," and "equivalent." Such educational materials typically provide examples that clarify the process of simplification. Overall, context is essential for accurately discussing the differences between expressions and their simplified forms.
arroww
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State the differences between an expression and its simplified equivalent.
 
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The main difference that comes to my mind is that of removable singularities. For example, consider:

$$f(x)=\frac{x}{x}$$

This is the same as :

$$f(x)=1$$ where $$x\ne0$$
 
arroww said:
State the differences between an expression and its simplified equivalent.
The only think that I can say is that the second expression is presumably simpler. Unfortunately, it is not possible to answer this question outside the context of a particular course or book. This context must provide definitions for such concepts and "expression", "simplified" and "equivalent". I would guess the course or book also give a number of examples of simplifications that can help answer the question.
 
I have been insisting to my statistics students that for probabilities, the rule is the number of significant figures is the number of digits past the leading zeros or leading nines. For example to give 4 significant figures for a probability: 0.000001234 and 0.99999991234 are the correct number of decimal places. That way the complementary probability can also be given to the same significant figures ( 0.999998766 and 0.00000008766 respectively). More generally if you have a value that...

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