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JB_2023
HSC - উচ্চতর গণিত ১ম পত্র
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অধ্যায়-১০ঃ যোগজীকরণ
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∫
0
1
4
d
x
1
+
x
2
=
\mathrm {\int_{0}^{1} \dfrac{4 d x}{1+x^{2}}=}
∫
0
1
1
+
x
2
4dx
=
কত?
A.
4
ln
2
4 \ln 2
4
ln
2
B.
ln
2
\ln 2
ln
2
C.
π
\pi
π
D.
π
4
\dfrac{\pi}{4}
4
π
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