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SUST-B_10-11
HSC - উচ্চতর গণিত ২য় পত্র
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অধ্যায়-০৫ঃ দ্বিপদী বিস্তৃতি
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(
1
+
x
)
n
=
1
−
2
x
+
3
x
2
−
4
x
3
+
…
…
.
+
(
−
1
)
r
(
r
+
1
)
x
r
+
(1+x)^{n}=1-2 x+3 x^{2}-4 x^{3}+\ldots \ldots .+(-1)^{r}(r+1) x^{r}+
(
1
+
x
)
n
=
1
−
2
x
+
3
x
2
−
4
x
3
+
……
.
+
(
−
1
)
r
(
r
+
1
)
x
r
+
............. হলে
n
=
?
n = ?
n
=
?
A.
-1
B.
-2
C.
-3
D.
-4
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