यदि \(G={x\in \mathbb{Z}: x^2<2x+8}\), तो (G) का सही रोस्टर रूप कौन-सा है?
If \(G={x\in \mathbb{Z}: x^2<2x+8}\), which is the correct roster form of (G)?
Correct answer and explanation
A. \(G=\{-1,0,1,2,3\}\)
Concept
\(x^2<2x+8\) को \(x^2-2x-8<0\) में बदलें। / Convert \(x^2<2x+8\) into \(x^2-2x-8<0\).
Why this answer is correct
((x-4)(x+2)<0) से (-2<x<4) मिलता है, इसलिए पूर्णांक (-1,0,1,2,3) हैं। / From ((x-4)(x+2)<0), we get (-2<x<4), so the integer elements are (-1,0,1,2,3).
Exam Tip
सख्त असमानता में सीमा बिंदु शामिल नहीं किए जाते। / In strict inequalities, boundary points are not included.
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