Q. 55.0( 3 Votes )

# Find the value of k for which the

points A(1, -1), B(2, k) and C(4, 5) are collinear.

Answer :

Since they are collinear, the area will be 0

**→**

Expanding with C_{3}

→ 0 = (10-4k)-(5+4)+(k+2)

→ 0=-3k+3

→ 3k=3

∴ k= 1

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