JEE Main 2026 · Session 2 · Shift 1 · Mathematics

Question 13

If the point of intersection of the lines (x+1)/3 = (y+a)/5 = (z+b+1)/7 and (x−2)/1 = (y−b)/4 = (z−2a)/7 lies on the xy-plane, then the value of a + b is:

• A. 2
• B. 5
• C. 7Correct answer
• D. 9

Not yet checked by a person: transcribed from the official question paper and matched against NTA’s official answer key by the question’s own ID on 16 September 2026, never worked out independently. Spotted a mistake? Tell us and we’ll fix it. No explanation is published here yet.