Mathematics · Straight lines

JEE Main 2026 — 22 January, Evening Shift — Question 7

Among the statements

(S1) : If A(5,−1)\mathrm{A}(5,-1) and B(−2,3)\mathrm{B}(-2,3) are two vertices of a triangle, whose orthocentre is (0,0)(0,0), then its third vertex is (−4,−7)(-4,-7) and

(S2) : If positive numbers 2a,b,c2 \mathrm{a}, \mathrm{b}, \mathrm{c} are three consecutive terms of an A.P., then the lines ax+\mathrm{ax}+ by +c=0+\mathrm{c}=0 are concurrent at (2,−2)(2,-2),

  1. Option A:

    Only (S1) is correct

  2. Option B:

    Only (S2) is correct

  3. Option C:

    Both are incorrect

  4. Option D:

    Both are correct

    Correct

Answer: D

Step-by-step solution

Solution of statement-1 mAO⋅mBC=−1\mathrm{m}_{\mathrm{AO}} \cdot \mathrm{m}_{\mathrm{BC}}=-1

⇒5 h−k+13=0\begin{gathered} \Rightarrow 5 \mathrm{~h}-\mathrm{k}+13=0 \end{gathered}

mAB⋅mOC=−1\mathrm{m}_{\mathrm{AB}} \cdot \mathrm{m}_{\mathrm{OC}}=-1

⇒4k=7 h\begin{gathered} \Rightarrow 4 \mathrm{k}=7 \mathrm{~h} \end{gathered} ⇒ third vertex is (−4,−7)(-4,-7)

∴ Statement 1 is correct.

Solution of statement-2

2a,b,c→2 \mathrm{a}, \mathrm{b}, \mathrm{c} \rightarrow A.P. b=2a+c2\mathrm{b}=\frac{2 \mathrm{a}+\mathrm{c}}{2}

⇒2a−2 b+c=0\Rightarrow 2 \mathrm{a}-2 \mathrm{~b}+\mathrm{c}=0

∵ lines ax+by+c=0\mathrm{ax}+\mathrm{by}+\mathrm{c}=0 are concurrent then x2=y−2=11\frac{\mathrm{x}}{2}=\frac{\mathrm{y}}{-2}=\frac{1}{1}

x=2\mathrm{x}=2 and y=−2\mathrm{y}=-2

∴ Point of concurrency is (2,−2)(2,-2)

∴ Statement 2 is correct.

Solution figure

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Subject
Mathematics
Chapter
Straight lines
Topic
Special Points in a Triangle
Among the statements (S1) : If A (5,-1) and B (-2,3) are two vertices… | JEE Main 2026 PYQ with Solution · DhiX AI