document.write( "Question 889661: Which of the following functions are even?
\n" ); document.write( "I 3y=(x^4)+x
\n" ); document.write( "II y= abs(x-2) *abs= absolute value
\n" ); document.write( "III (e^x^2)-1\r
\n" ); document.write( "\n" ); document.write( "This is a multiple choice question, the answer choices being,
\n" ); document.write( "a. I only
\n" ); document.write( "b. II only
\n" ); document.write( "c. III only
\n" ); document.write( "d. II and III
\n" ); document.write( "e. I,II, and III\r
\n" ); document.write( "\n" ); document.write( "using my graphing calculator I got I and III which is not an answer but algebraically I got III only, is this correct? Thank you so much for your time and help!
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Algebra.Com's Answer #538587 by Fombitz(32388)\"\" \"About 
You can put this solution on YOUR website!
For an even function, \"f%28x%29=f%28-x%29\"
\n" ); document.write( "I. \"3y=x%5E4%2Bx\"
\n" ); document.write( "\"f%28x%29=%281%2F3%29%28x%5E4%2Bx%29\"
\n" ); document.write( "\"f%28-x%29=%281%2F3%29%28x%5E4-x%29\"
\n" ); document.write( "So I is not an even function.
\n" ); document.write( "\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2C%281%2F3%29%28x%5E4%2Bx%29%29\"\r
\n" ); document.write( "\n" ); document.write( ".
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\n" ); document.write( "II. I assume you mean \"f%28x%29=abs%28x-2%29%2Aabs%28x%29\"
\n" ); document.write( "\"f%28-x%29=abs%28-x-2%29%2Aabs%28-x%29\"
\n" ); document.write( "Although \"abs%28x%29=abs%28-x%29\", it's not the case that,
\n" ); document.write( "\"abs%28-x-2%29=abs%28x-2%29\"
\n" ); document.write( "So II is not an even function.
\n" ); document.write( "It is symmetric but not about the y-axis but about \"x=2\".
\n" ); document.write( "\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2Cabs%28x-2%29%2Aabs%28x%29%281%2F3%29%29\"
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\n" ); document.write( "III. \"f%28x%29=e%5E%28x%5E2%29-1\"
\n" ); document.write( "\"f%28-x%29=e%5E%28x%5E2%29-1\"
\n" ); document.write( "So III is an even function.
\n" ); document.write( "\"graph%28300%2C300%2C-5%2C5%2C-5%2C5%2Ce%5E%28x%5E2%29-1%29\"
\n" ); document.write( ".
\n" ); document.write( ".\r
\n" ); document.write( "\n" ); document.write( "The solution is c.
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