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Mathematics
Problem
The coefficient of the term independent of
x
x
x
in the expansion of
(
1
+
2
x
)
5
(
1
+
3
x
)
5
\left(1+2x\right)^{5}\left(1+\dfrac{3}{x}\right)^{5}
(
1
+
2
x
)
5
(
1
+
x
3
)
5
is a)
65
535
65\,535
65
535
b)
57
751
57\,751
57
751
c)
65
527
65\,527
65
527
d)
16
807
16\,807
16
807
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