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JEE Mains · Maths · STD 11 - 4.1 complex nubers

यदि समुच्चय \(\left\{\operatorname{Re}\left(\frac{\mathrm{z}-\overline{\mathrm{z}}+\mathrm{z} \overline{\mathrm{z}}}{2-3 \mathrm{z}+5 \overline{\mathrm{z}}}\right): \mathrm{z} \in \mathbb{C}, \operatorname{Re}(\mathrm{z})=3\right\}\) अंतराल \((\alpha, \beta]\) के बराबर है, तो \(24(\beta-\alpha)\) का मान है:

  1. A \(36\)
  2. B \(42\)
  3. C \(27\)
  4. D \(30\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(30\)

Step-by-step Solution

Detailed explanation

Let \(z_1=\left(\frac{z-\bar{z}+z \bar{z}}{2-3 z+5 \bar{z}}\right)\) Let \(z=3+i y\) \(\bar{z}=3-i y\) \(z_1=\frac{2 i y+\left(9+y^2\right)}{2-3(3+i y)+5(3-i y)}\) \(=\frac{9+y^2+i(2 y)}{8-8 i y}\) \(=\frac{\left(9+y^2\right)+i(2 y)}{8(1-i y)}\)…
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