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Approximate when the function is positive, negative, increasing, or decreasing.
-x4 + 8x² +9
Ay
y =
-2
20
X
The function is positive:
decreasing:
increasing:
:: -3
and
::x>3
all real numbers
negative:
#
::
and
x < -2 :: 0
-2
and
#x>2
&
I
SO+
Sagot :
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