Consider a function $f$ which has a first derivative given by $f\prime(x)=x^2-x-1$, where \(x\in

Question

Consider a function $f$ which has a first derivative given by $f\prime(x)=x^2-x-1$, where $x\in\mathbb{R}$. Find the range of values of $x$ for which $f$ is decreasing.

Accepted Answer

$\frac{1-\sqrt5}{2}<x<\frac{1+\sqrt5}{2}$

IB AA HL May 2026 P2 TZA Q2

IB AA HL May 2026 P2 TZA Q2

Solution:

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