वक्र x3 + y2 + 3y + x = 0 और बिंदु (2, -1) से होकर गुजरने वाली स्पर्श रेखा का समीकरण क्या है?

  1. 13x + y - 25 = 0
  2. 10x - 5y - 25 = 0
  3. 2y + 13x - 24 = 0
  4. 2y + 12x - 22 = 0

Answer (Detailed Solution Below)

Option 1 : 13x + y - 25 = 0
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Detailed Solution

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अवधारणा:

वक्र के लिए स्पर्श रेखा का समीकरण ज्ञात करने के चरण:

f(x) का पहला अवकलज ज्ञात कीजिए। 

स्पर्श रेखा का समीकरण ज्ञात करने के लिए बिंदु-ढलान सूत्र का प्रयोग कीजिए। 

बिंदु-ढलान सामान्य रूप है: y - y₁=m(x - x₁), जहाँ m = स्पर्श रेखा की ढलान  

गणना:

दिया गया वक्र है: x3 + y2 + 3y + x = 0

x के सापेक्ष अवकलन करने पर,

3x2 + 2y + 3 + 1 = 0

(2y + 3) = -3x2 - 1

 = 

(2, -1) पर 

 = 

 =  = -13

स्पर्श रेखा का समीकरण निम्नलिखित है:

(y - (-1)) = -13(x - 2)

y + 1 = -13x + 26

y + 13x - 25 = 0

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