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Prove-that-1-A-A-1-




Question Number 55942 by Tawa1 last updated on 06/Mar/19
Prove that:     (1/(∣A∣))  =  A^1
$$\mathrm{Prove}\:\mathrm{that}:\:\:\:\:\:\frac{\mathrm{1}}{\mid\boldsymbol{\mathrm{A}}\mid}\:\:=\:\:\boldsymbol{\mathrm{A}}^{\mathrm{1}} \\ $$
Commented by 121194 last updated on 06/Mar/19
what A?
$$\mathrm{what}\:\mathrm{A}? \\ $$

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