Mathematics, 20.04.2020 21:30 Kennabug4503
F(x)=(7xβ2)(5xβ8)(x+5)(xβ6)f, left parenthesis, x, right parenthesis, equals, left parenthesis, 7, x, minus, 2, right parenthesis, left parenthesis, 5, x, minus, 8, right parenthesis, left parenthesis, x, plus, 5, right parenthesis, left parenthesis, x, minus, 6, right parenthesis has zeros at
x
=
β
5
x=β5x, equals, minus, 5,
x
=
2
7
x=
7
2
x, equals, start fraction, 2, divided by, 7, end fraction,
x
=
8
5
x=
5
8
x, equals, start fraction, 8, divided by, 5, end fraction, and
x
=
6
x=6x, equals, 6.
What is the sign of
f
ff on the interval
β
5
<
x
<
2
7
β5 7
2
Answers: 2
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