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OpenStudy (anonymous):
What are all real roots of f(x)=3x^8+7?
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OpenStudy (zarkon):
\[3x^8+7>0\] there are no real roots
OpenStudy (solomonzelman):
when you subtract 7 from both sides, and divide both sides by 3, you will get x^8 equal to some negative number. and if x is a real number, then, \(\large\color{black}{ x^{\tt even~~number}\ge0 }\)
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