For what value of p, the …

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For what value of p, the points (2,1),(p,-7) and (-1,3)are collinear

Posted by Brajmohan Yadav 1 year, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Naitik Nama 1 year, 9 months ago

(2,1), (p,−1) & (−1,3) are collinear ⇒p−2−1−1=−1−p3−(−1) ⇒p−2−2=−1−p4 ⇒2(1+p)=4(p−2)⇒2+2p=4p−8 ⇒10−2p ∴ p=5

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