Question

The points (-5, 1), (1, p) and (4, -2) are collinear if
the value of p is
(a) 3
(b) 2
(c) 1
(d) -1


Answer it with explanation​

Answer 1

Answer:

$\huge\pink{AnSwer}$

==> D) -1

Explanation :-

Reason: The points are collinear if area of Δ = 0

$= \frac{1}{2} [ \: - 5(p + 2) + 1( - 2 - 1) + 4(1 - p)] - 0$

⇒$- 5 \: p \: - 10 - 3 + 4 - 4 p = 0$

⇒$- 9p = + 9$

∴ p = -1

Answer 2

Answer:

-1 ᴀɴsᴡᴇʀ~

Step-by-step explanation:

ʙʀᴀɪɴʟɪᴀsᴛ ᴍᴀʀᴋ ᴋʀᴅᴇɴᴀ✌️⚡