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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Misc, 18 Find the number of non-zero integral solutions of the equation |1 – 𝑖|𝑥 = 2𝑥 . We need to find the value of x which should be an integer but not 0 Lets first find the value of |1 – 𝑖| 1 – 𝑖 Complex number is of the form x + iy Where 𝑥 = 1 𝑦 = −1 |1 – 𝑖| = √(𝑥^2+𝑦2) = √((1)2+(−1)2) = √(1+1) = √2 Hence, |1 – 𝑖| = √2 Given |1 – 𝑖|𝑥 = 2𝑥 Putting |1 – 𝑖| = √2 (√2)𝑥 = 2𝑥 (√2)𝑥 = (√2 × √2)𝑥 (√2)𝑥 = (√2)^(2 × 𝑥) (√2)𝑥 = 〖√2〗^( 2𝑥) Comparing Powers 𝑥 = 2𝑥 𝑥 −2𝑥 = 0 − 𝑥 = 0 𝑥 = 0 Hence, There is no non-zero integral solution

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.