AM-2266

Product rule

A Math · Secondary 4 · Medium · Product rule

1. $x<1-\sqrt{5}$ or $x>1+\sqrt{5}$
2. $1-\sqrt{5}<x<1+\sqrt{5}$
3. $x\le 1-\sqrt{5}$ or $x\ge 1+\sqrt{5}$
4. $x>0$ only

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