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Consider the two sets: \(A=\left{m\in R\right.\) : both the roots of \({x}^{2}-(m+1)\)\(x=m+4\) are real} and \(B=[-3,5)…

Q1

Consider the two sets: \(A=\left{m\in R\right.\) : both the roots of \({x}^{2}-(m+1)\)\(x=m+4\) are real} and \(B=[-3,5).\) Which of the following is not true?

a

\(\mathrm{A}\cap \mathrm{B}={-3}\)

b

\(B-A=(-3,5)\)

c

\(\mathrm{A}\cup \mathrm{B}=\mathrm{R}\)

d

\(\mathrm{A}-\mathrm{B}=(-\infty ,-3)\cup (5,\infty )\)

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