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Could-3-2-be-drawn-on-numbered-line-with-the-help-of-ruler-and-compass-only-




Question Number 3262 by Rasheed Soomro last updated on 08/Dec/15
Could ^3 (√2)  be drawn on numbered line with   the help  of  ruler and compass only?
$$\mathcal{C}{ould}\:\:^{\mathrm{3}} \sqrt{\mathrm{2}}\:\:{be}\:{drawn}\:{on}\:{numbered}\:{line}\:{with}\: \\ $$$${the}\:{help}\:\:{of}\:\:{ruler}\:{and}\:{compass}\:{only}? \\ $$
Commented by prakash jain last updated on 09/Dec/15
(2)^(1/3)  cannot be drawn using a ruler and compass.
$$\sqrt[{\mathrm{3}}]{\mathrm{2}}\:\mathrm{cannot}\:\mathrm{be}\:\mathrm{drawn}\:\mathrm{using}\:\mathrm{a}\:\mathrm{ruler}\:\mathrm{and}\:\mathrm{compass}. \\ $$
Commented by Rasheed Soomro last updated on 10/Dec/15
Can this be proved?
$$\mathcal{C}{an}\:{this}\:{be}\:{proved}? \\ $$
Commented by 123456 last updated on 10/Dec/15
transcendental number?
$$\mathrm{transcendental}\:\mathrm{number}? \\ $$
Commented by prakash jain last updated on 11/Dec/15
(2)^(1/3)  is not transcendental as it is a solution  of x^3 −2=0.  In 2 D with ruler and compass only (√2) and  any expression inolving square roots can be  constructed.
$$\sqrt[{\mathrm{3}}]{\mathrm{2}}\:\mathrm{is}\:\mathrm{not}\:\mathrm{transcendental}\:\mathrm{as}\:\mathrm{it}\:\mathrm{is}\:\mathrm{a}\:\mathrm{solution} \\ $$$$\mathrm{of}\:{x}^{\mathrm{3}} −\mathrm{2}=\mathrm{0}. \\ $$$$\mathrm{In}\:\mathrm{2}\:\mathrm{D}\:\mathrm{with}\:\mathrm{ruler}\:\mathrm{and}\:\mathrm{compass}\:\mathrm{only}\:\sqrt{\mathrm{2}}\:\mathrm{and} \\ $$$$\mathrm{any}\:\mathrm{expression}\:\mathrm{inolving}\:\mathrm{square}\:\mathrm{roots}\:\mathrm{can}\:\mathrm{be} \\ $$$$\mathrm{constructed}. \\ $$

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