Last updated at Dec. 16, 2024 by Teachoo
Misc, 18 Find the number of non-zero integral solutions of the equation |1 โ ๐|๐ฅ = 2๐ฅ . We need to find the value of x which should be an integer but not 0 Lets first find the value of |1 โ ๐| 1 โ ๐ Complex number is of the form x + iy Where ๐ฅ = 1 ๐ฆ = โ1 |1 โ ๐| = โ(๐ฅ^2+๐ฆ2) = โ((1)2+(โ1)2) = โ(1+1) = โ2 Hence, |1 โ ๐| = โ2 Given |1 โ ๐|๐ฅ = 2๐ฅ Putting |1 โ ๐| = โ2 (โ2)๐ฅ = 2๐ฅ (โ2)๐ฅ = (โ2 ร โ2)๐ฅ (โ2)๐ฅ = (โ2)^(2 ร ๐ฅ) (โ2)๐ฅ = ใโ2ใ^( 2๐ฅ) Comparing Powers ๐ฅ = 2๐ฅ ๐ฅ โ2๐ฅ = 0 โ ๐ฅ = 0 ๐ฅ = 0 Hence, There is no non-zero integral solution
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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 and Computer Science at Teachoo