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What is the conjugate of 2-i(1-2i)2? - Mathematics

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प्रश्न

What is the conjugate of `(2 - i)/(1 - 2i)^2`?

बेरीज
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उत्तर

Given that z = `(2 - i)/(1 - 2i)^2`

= `(2 - i)/(1 + 4i^2 - 4i)`

= `(2 - i)/(1 - 4 - 4i)`

= `(2 - i)/(-3 - 4i)`

= `(2 - i)/(-3 - 4i) xx (-3 + 4i)/(-3 + 4i)`

= `(-6 + 8i + 3i - 4i^2)/((-3)^2 - (4i)^2)`

= `(-6 + 11i + 4)/(9 - 16i^2)`

= `(-2 + 11i)/(9 + 16)`

= `(-2 + 11i)/25`

= `(-2)/25 + 11/25 i`

∴ `barz = (-2)/25 - 11/25 i`

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पाठ 5: Complex Numbers and Quadratic Equations - Exercise [पृष्ठ ९४]

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एनसीईआरटी एक्झांप्लर Mathematics [English] Class 11
पाठ 5 Complex Numbers and Quadratic Equations
Exercise | Q 28 | पृष्ठ ९४
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