Is -3[(x-3)^2-9] Increasing or Decreasing on Domain [0,6]?

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SUMMARY

The function -3[(x-3)^2-9] is analyzed for its increasing or decreasing behavior on the domain [0,6]. The derivative of the function, y = -3x^2 + 9, reveals that it is a downward-opening parabola with a vertex at (0, 9). The function is increasing for x < 0 and decreasing for x > 0, confirming that within the specified domain, the function is decreasing for all x values from 0 to 6.

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The mentalist
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Hello everyone,
Can you please show me how to 'determine weather this funtion -3[(x-3)^2-9] is increasing or decreasing on the the domain [0,6]
Thanks in advance .
 
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The mentalist said:
Hello everyone,
Can you please show me how to 'determine weather this funtion -3[(x-3)^2-9] is increasing or decreasing on the the domain [0,6]
Thanks in advance .

Do a rough plot and look.

Take the derivative and see is it positve or negative.
 
y= -3x^2+ 9 is a parabola with vertex at (0, 9), opening downward. It is increasing for x< 0 and decreasing for x> 0. Do you see how that answers your question?
 

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