MathDB
Statement Truth

Source:

January 11, 2009

Problem Statement

Consider the statements: I: (\sqrt { \minus{} 4})(\sqrt { \minus{} 16}) \equal{} \sqrt {( \minus{} 4)( \minus{} 16)}, II: \sqrt {( \minus{} 4)( \minus{} 16)} \equal{} \sqrt {64}, and \sqrt {64} \equal{} 8. Of these the following are incorrect. <spanclass=latexbold>(A)</span> none<spanclass=latexbold>(B)</span> I only<spanclass=latexbold>(C)</span> II only<spanclass=latexbold>(D)</span> III only<spanclass=latexbold>(E)</span> I and III only <span class='latex-bold'>(A)</span>\ \text{none} \qquad <span class='latex-bold'>(B)</span>\ \text{I only} \qquad <span class='latex-bold'>(C)</span>\ \text{II only} \qquad <span class='latex-bold'>(D)</span>\ \text{III only} \qquad <span class='latex-bold'>(E)</span>\ \text{I and III only}