Question

尼

65.66怎麼證明，real solution是什麼？是真正的解法？

Finding a Solution In Exercises 65–68, use the Intermediate
Value Theorem and Rolle's Theorem to prove that the equation
has exactly one real solution.
65. x5 + x3 + x + 1 = 0
66. 2x5 + 7x – 1 = 0
-