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Find the multiplicative inverse of the complex number. 5+3i

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Question

Find the multiplicative inverse of the complex number.

`sqrt5 + 3i`

Sum
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Solution

Multiplicative inverse of `sqrt5 + 3i`

= `1/(sqrt5  + 3i) = 1/(sqrt5  + 3i) xx (sqrt5 - 3i)/ (sqrt5 - 3i)`

= `(sqrt5 - 3i)/(5 - 9i^2)`

= `(sqrt5 - 3i)/(5 +9)`

= `(sqrt(5) - 3i)/14`

= `sqrt5/14 - 3/14 i`

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Chapter 4: Complex Numbers and Quadratic Equations - EXERCISE 4.1 [Page 83]

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NCERT Mathematics [English] Class 11
Chapter 4 Complex Numbers and Quadratic Equations
EXERCISE 4.1 | Q 12. | Page 83
R.D. Sharma Mathematics [English] Class 11
Chapter 13 Complex Numbers
Exercise 13.2 | Q 4.4 | Page 32

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