Question 83066
f(x) = (x+1)^(3.4)  

For the function f, defined above, what are all the values of x for which f(x) is a real number?
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The 4 in the exponent means you are taking the 4th root.
For the result to be Real x+1 must be >= zero:
x+1>=0
x>=-1
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Cheers,
Stan H.