यदि \(U={x:x\in\mathbb{Z},-10\le x\le 10}\) और \(A={x:x^2-9x+20\le 0}\), तो (A') क्या है?

If \(U={x:x\in\mathbb{Z},-10\le x\le 10}\) and \(A={x:x^2-9x+20\le 0}\), what is (A')?

Explanation opens after your attempt
Correct Answer

A. ({-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,7,8,9,10})

Step 1

Concept

\(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\), so \(A=\{4,5\}\). The complement is obtained by removing (4,5) from (U).

Step 2

Why this answer is correct

The correct answer is A. ({-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,7,8,9,10}). \(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\), so \(A=\{4,5\}\). The complement is obtained by removing (4,5) from (U).

Step 3

Exam Tip

\(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\) नहीं, सही हल \(4\le x\le 5\) है, इसलिए \(A=\{4,5\}\)। दिए गए विकल्पों में (A') वही है जो (U) से (4,5) हटाकर बनता है।

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Mathematics Answer, Explanation and Revision Hints

यदि \(U={x:x\in\mathbb{Z},-10\le x\le 10}\) और \(A={x:x^2-9x+20\le 0}\), तो (A') क्या है? / If \(U={x:x\in\mathbb{Z},-10\le x\le 10}\) and \(A={x:x^2-9x+20\le 0}\), what is (A')?

Correct Answer: A. ({-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,7,8,9,10}). Explanation: \(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\) नहीं, सही हल \(4\le x\le 5\) है, इसलिए \(A=\{4,5\}\)। दिए गए विकल्पों में (A') वही है जो (U) से (4,5) हटाकर बनता है। / \(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\), so \(A=\{4,5\}\). The complement is obtained by removing (4,5) from (U).

Which concept should I revise for this Mathematics MCQ?

\(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\), so \(A=\{4,5\}\). The complement is obtained by removing (4,5) from (U).

What exam hint can help solve this Mathematics question?

\(x^2-9x+20\le 0\Rightarrow 4\le x\le 5\) नहीं, सही हल \(4\le x\le 5\) है, इसलिए \(A=\{4,5\}\)। दिए गए विकल्पों में (A') वही है जो (U) से (4,5) हटाकर बनता है।