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Mathematics
Mathematics
Problem
Find the value of
b
>
1
b>1
b
>
1
such that the average value of the function
f
(
x
)
=
3
x
f(x)=3x
f
(
x
)
=
3
x
on the interval
[
1
,
b
]
[1,b]
[
1
,
b
]
equals
9
9
9
. a)
6
6
6
b)
7
7
7
c)
5
5
5
d)
8
8
8
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