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4-2.Quadratic Equations and Inequations
easy
જો $(x + 1)$ એ સમીકરણ ${x^4} - (p - 3){x^3} - (3p - 5){x^2}$ $ + (2p - 7)x + 6$ નો એક અવયવ હોય તો $p = $. . . .
A
$4$
B
$2$
C
$1$
D
એકપણ નહી.
(IIT-1975)
Solution
(a) If $(x + 1)$ is a factor of
${x^4} – (p – 3){x^3} – (3p – 5){x^2} + (2p – 7)x + 6$ , then by putting $x = – 1$, we get
$1 + (p – 3) – (3p – 5) – (2p – 7) + 6 = 0$
==> $ – 4p = – 16\,\,\, \Rightarrow p = 4$.
Standard 11
Mathematics
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