{"id":19989,"date":"2024-04-15T05:46:54","date_gmt":"2024-04-15T05:46:54","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=19989"},"modified":"2024-04-15T05:46:54","modified_gmt":"2024-04-15T05:46:54","slug":"for-the-matrix-left-beginarray20c-42-24-endarray-right-the-eigen-value-corresponding-to-the-eigen-vector-left-beginarray20c-101-101-end","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/for-the-matrix-left-beginarray20c-42-24-endarray-right-the-eigen-value-corresponding-to-the-eigen-vector-left-beginarray20c-101-101-end\/","title":{"rendered":"For the matrix \\[\\left[ {\\begin{array}{*{20}{c}} 4&#038;2 \\\\ 2&#038;4 \\end{array}} \\right]\\] the eigen value corresponding to the eigen vector \\[\\left[ {\\begin{array}{*{20}{c}} {101} \\\\ {101} \\end{array}} \\right]\\] is A. 2 B. 4 C. 6 D. 8"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;2&#8243; option2=&#8221;4&#8243; option3=&#8221;6&#8243; option4=&#8221;8&#8243; correct=&#8221;option3&#8243;]<!--more--><\/p>\n<p>The correct answer is $\\boxed{4}$.<\/p>\n<p>To find the eigenvalues of a matrix, we can use the following formula:<\/p>\n<p>$$\\lambda = \\frac{tr(A) &#8211; \\det(A)}{2}$$<\/p>\n<p>where $tr(A)$ is the trace of $A$ and $\\det(A)$ is the determinant of $A$.<\/p>\n<p>In this case, we have:<\/p>\n<p>$$tr(A) = 4 + 4 = 8$$<\/p>\n<p>$$\\det(A) = 4^2 &#8211; 2 \\cdot 4 \\cdot 2 = 0$$<\/p>\n<p>Therefore, the eigenvalues of $A$ are $\\frac{8 &#8211; 0}{2} = 4$.<\/p>\n<p>To find the eigenvector corresponding to the eigenvalue $\\lambda = 4$, we can use the following formula:<\/p>\n<p>$$v = \\frac{1}{\\det(A &#8211; \\lambda I)}(A &#8211; \\lambda I)u$$<\/p>\n<p>where $u$ is any non-zero vector.<\/p>\n<p>In this case, we can choose $u = \\left[ {\\begin{array}{*{20}{c}} {101} \\ {101} \\end{array}} \\right]$.<\/p>\n<p>Therefore, the eigenvector corresponding to the eigenvalue $\\lambda = 4$ is $\\boxed{\\left[ {\\begin{array}{*{20}{c}} {101} \\ {101} \\end{array}} \\right]}$.<\/p>\n<p>Here is a brief explanation of each option:<\/p>\n<ul>\n<li>Option A: $2$ is not an eigenvalue of $A$.<\/li>\n<li>Option B: $4$ is an eigenvalue of $A$.<\/li>\n<li>Option C: $6$ is not an eigenvalue of $A$.<\/li>\n<li>Option D: $8$ is not an eigenvalue of $A$.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;2&#8243; option2=&#8221;4&#8243; option3=&#8221;6&#8243; option4=&#8221;8&#8243; correct=&#8221;option3&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[489],"tags":[],"class_list":["post-19989","post","type-post","status-publish","format-standard","hentry","category-linear-algebra","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>For the matrix \\[\\left[ {\\begin{array}{*{20}{c}} 4&amp;2 \\\\ 2&amp;4 \\end{array}} \\right]\\] the eigen value corresponding to the eigen vector \\[\\left[ {\\begin{array}{*{20}{c}} {101} \\\\ {101} \\end{array}} \\right]\\] is A. 2 B. 4 C. 6 D. 8<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/for-the-matrix-left-beginarray20c-42-24-endarray-right-the-eigen-value-corresponding-to-the-eigen-vector-left-beginarray20c-101-101-end\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"For the matrix \\[\\left[ {\\begin{array}{*{20}{c}} 4&amp;2 \\\\ 2&amp;4 \\end{array}} \\right]\\] the eigen value corresponding to the eigen vector \\[\\left[ {\\begin{array}{*{20}{c}} {101} \\\\ {101} \\end{array}} \\right]\\] is A. 2 B. 4 C. 6 D. 8\" \/>\n<meta property=\"og:description\" content=\"[amp_mcq option1=&#8221;2&#8243; 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