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Question Number 11419 by fadim727 last updated on 25/Mar/17

$$\mathrm{If}\mathrm{A}=\left\{\mathrm{whole}\mathrm{numbers}\right\}\mathrm{and}$$$$\mathrm{B}=\left\{\mathrm{natural}\mathrm{numbers}\right\},\mathrm{then}\mathrm{A}△\mathrm{B}=\mathrm{\_}\mathrm{\_}\mathrm{\_}.$$

Commented by FilupS last updated on 26/Mar/17

$$\mathrm{whole}\mathrm{numbers}=\mathbb{Z}=\{...,-2,-1,0,1,2,...\}$$$$\mathrm{natural}\mathrm{numbers}=\mathbb{N}=\{1,2,...\}$$$$$$$$A=\mathbb{Z},B=\mathbb{N}$$$$\mathrm{if}A△B\mathrm{means}A\wedge B,\mathrm{or}A\cap B,\mathrm{then}:$$$$A\cap B=\mathbb{Z}$$

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