X2 is double the amount of x1
Answer:
ok
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F ( x ) = x³ + 3 x
Slope of a horizontal line is 0.
f ` ( x ) = 3 x² + 3
3 x² + 3 = 0
3 x² = - 3 / : 3
x² = - 1 , which give complex roots.
Answer: NONE
