Monday, 12 March 2018

fractions - Is the product of two numbers both less than one less than one



I'm bad at mathematics, and I wanted to know something.



Say there are two numbers $a$ and $b$ where $a, b \in \Bbb R$ $-1 < a < 1$ and $-1 < b < 1$
Is it necessary that $a \times b < 1$?




Edit: I was in hurry and didn't notice the big mistake I did


Answer



Yes, because $|ab|=|a||b|<1\cdot 1 = 1$, hence $-1

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