उस बिंदु का निर्देशांक ज्ञात कीजिए जहाँ बिंदु A (2, 3, 2) और B (5, 1, 6) से होकर गुजरने वाली रेखा XY - तल को पार करती है?

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  1. \(\frac{7}{2}, 4, \frac{1}{2}\)
  2. \(\frac{3}{2}, 4, 2\)
  3. \(\frac{7}{2}, 2, 0\)
  4. \(\frac{1}{2}, 4, 0\)

Answer (Detailed Solution Below)

Option 4 : \(\frac{1}{2}, 4, 0\)
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दिया गया है:

A(2, 3, 2) और B(5, 1, 6) दो बिंदु हैं।

संकल्पना:

A(x1, y1, z1) और B(x2, y2, z2) से होकर गुजरने वाली एक रेखा के काटीज़ियन समीकरण को निम्न द्वारा ज्ञात किया गया है, 

\(\frac{x - x_1}{x_2 - x_1} = \frac{y - y_1}{y_2 - y_1} = \frac{z - z_1}{z_2- z_1}\)

गणना:

यहाँ, x1 = 2, y1 = 3, z1 = 2, x2 = 5, y2 = 1 और z2 = 6

आवश्यक रेखा का काटीज़ियन समीकरण निम्न है:

⇒ \(\frac{x - 2}{5 - 2} = \frac{ y - 3}{1 -3} = \frac{z - 2}{6 - 2}\)

⇒ \(\frac{ x - 2}{3} = \frac{ y - 3}{-2} = \frac{ z - 2}{4}\)    ---- समीकरण (1)

रेखा xy - तल अर्थात् z = 0 को पार करता है। 

इसलिए, समीकरण (1) में z = 0 रखने पर, हमें निम्न प्राप्त होता है

⇒ \(\frac{ x - 2}{3} = \frac{ y - 3}{-2} = \frac{ 0 - 2}{4}\)

⇒ \(\frac{ x - 2}{3} = \frac{ y - 3}{-2} = \frac{-1}{2}\)

⇒ \(\frac{ x - 2}{3} = \frac{-1}{2}\) और \( \frac{ y - 3}{-2} = \frac{-1}{2} \)

⇒ 2x - 4 =  - 3 और 2y - 6 = 2

⇒ 2x = 1 और 2y = 8

⇒ x = \(\frac{1}{2}\) और y = 4 

रेखा AB, (1/2, 4. 0) पर XY - तल को पार करता है।

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