SOLUTION: What is the domain of the equation: (x^3-x^2+2x-1)+(x^3+1) and how do you know that it is that domain?

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Question 937850: What is the domain of the equation: (x^3-x^2+2x-1)+(x^3+1) and how do you know that it is that domain?
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!


%28x%5E3-x%5E2%2B2x-1%29%2B%28x%5E3%2B1%29
x%5E3-x%5E2%2B2x-1%2Bx%5E3%2B1
x%5E3%2Bx%5E3-x%5E2%2B2x-1%2B1
2x%5E3-x%5E2%2B2x

The domain of a function is the complete set of possible values of the independent variable.
The domain is the set of all possible x-values which will make the function "work", and will output real y-values.
In general, we determine the domain by looking for those values of the independent variable (usually x) which we are allowed to use. (We have to avoid 0 on the bottom if we have a fraction, or negative values under the square root sign).
so, in your case does not matter what value you choose for x output will be a real y-value
then, the domain is:
R (all real numbers)