anonymous
  • anonymous
What is the maximum or minimum value of the function? What is the range? y = –2x^2 + 32x –12
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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cwrw238
  • cwrw238
find f'(x) and equate it to 0 solve for x
anonymous
  • anonymous
I don't understand that ?
cwrw238
  • cwrw238
oh - i've assumed you know some calculus

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anonymous
  • anonymous
Would it be like y=-2(0)^2+32(0)-12 ?
cwrw238
  • cwrw238
no what you have there is the intercept on y-axis
cwrw238
  • cwrw238
you need to change it to the vertex form y = –2x^2 + 32x –12 = -2(x^2 - 16x + 6) = -2( x - 8)^2 -64 + 6) = -2[(x-8)^2 - 58)] so the x coordinate at maximum = 8 a negative coefficient before x^3 means there is a maximum value
anonymous
  • anonymous
oh , but it says the maximum and range is only 116 . its either 116 or -116 ?
cwrw238
  • cwrw238
at maximum the function has a value -2*-58 = 116
anonymous
  • anonymous
ok , i see that . . .
cwrw238
  • cwrw238
the range is f(x)<= 116
anonymous
  • anonymous
less than or greater than ?
cwrw238
  • cwrw238
|dw:1350681832911:dw|
cwrw238
  • cwrw238
below the graph less or equal to 116
anonymous
  • anonymous
Thats what i thought it was (: . Thank you soo much for helping me ! (;
cwrw238
  • cwrw238
yw

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