document.write( "Question 999461: ok, so i'm in algebra one, and i have a test tommorow on our unit. one thing I don't get is domain and range. it shows an oval, and three numbers inside. i get the first and last one, but not the middle one. I don't know how to make a piecewise function with the {{}} thing so i'll put it as 2 layers. the piecewise function that i need help on is:
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document.write( "f(x)=3x+11 -5<=x<=-2
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document.write( " -x/2+5 -2
Algebra.Com's Answer #617084 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! one thing I don't get is domain and range. it shows an oval, and three numbers inside. i get the first and last one, but not the middle one. I don't know how to make a piecewise function with the {{}} thing so i'll put it as 2 layers. the piecewise function that i need help on is: \n" ); document.write( "f(x) = 3x+11 when -5<=x<=-2 \n" ); document.write( "f(x) =-x/2+5 when -2 < x <=4 \n" ); document.write( "-------- \n" ); document.write( "Domain \n" ); document.write( "This says the Domain (values of x) is \"All Real numbers greater \n" ); document.write( "than or equal to -5 and less than of equal to 4\". \n" ); document.write( "------ \n" ); document.write( "Range \n" ); document.write( "The range is the set of values \"y\" takes when the domain values are applied. \n" ); document.write( "---- \n" ); document.write( "y = 3x+11 has values between f(-5) and f(-2) \n" ); document.write( "f(-5) = (3(-5)+11) = -4 \n" ); document.write( "f(-2) = (3(-2)+11) = 5 \n" ); document.write( "-------- \n" ); document.write( "y = (-1/2)x+5 has values from f(2) and f(4) \n" ); document.write( "f(2) = (-1/2)(2)+5 = 4 \n" ); document.write( "f(4) = (-1/2)(4)+5 = 3 \n" ); document.write( "-------- \n" ); document.write( "So, what is the range? \n" ); document.write( "The lowest value is f(-5) = -4 \n" ); document.write( "The highest value is f(-2) = 5 \n" ); document.write( "---- \n" ); document.write( "So, the Range is \"All Real Numbers from -4 to 5\". \n" ); document.write( "------ \n" ); document.write( "You will see the Domain and the Range if you graph \n" ); document.write( "each of the pieces of the function on its own Domain. \n" ); document.write( "----- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "--------------- \n" ); document.write( " |