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AP EAMCET · Maths · Straight Lines

If the orthocenter of the triangle formed by the lines 2x+3 y-1=0, x+2y+1=0 and ax+by-1=0 lies at origin, then 1a+1b=

  1. A 0
  2. B 160
  3. C 18
  4. D 4
Verified Solution

Answer & Solution

Correct Answer

(B) 160

Step-by-step Solution

Detailed explanation

We have triangle ∆ABC AB: 2x+3y-1=0  ...1 Slope m1=-23 BC: x+2y+1=0  ...2 Slope m2=-12 CA: ax+by-1=0  ...3 Slope m3=-ab We know, the orthocenter of a triangle is the point of intersection of altitudes passing through the…