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IUT_14-15
HSC - উচ্চতর গণিত ২য় পত্র
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অধ্যায়-০৫ঃ দ্বিপদী বিস্তৃতি
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All Topics
The coefficient of
x
n
in the expansion of
x
(
1
−
4
x
)
(
1
−
5
x
)
is-
\text { The coefficient of } x^{n} \text { in the expansion of } \frac{x}{(1-4 x)(1-5 x)} \text { is- }
The coefficient of
x
n
in the expansion of
(
1
−
4
x
)
(
1
−
5
x
)
x
is-
A.
4
n
+
1
−
1
4^{n+1}-1
4
n
+
1
−
1
B.
4
n
+
5
n
4^{n}+5^{n}
4
n
+
5
n
C.
5
n
−
4
n
5^{n}-4^{n}
5
n
−
4
n
D.
5
n
+
1
−
1
5^{n+1}-1
5
n
+
1
−
1
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