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অসীম স্যার
HSC - উচ্চতর গণিত ১ম পত্র
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অধ্যায়-১০ঃ যোগজীকরণ
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f
(
x
)
=
1
x
f(x)=\frac{1}{x}
f
(
x
)
=
x
1
হলে-
i.
∫
f
(
x
)
d
x
=
ln
x
+
c
ii.
∫
f
(
1
x
)
d
x
=
−
1
x
+
c
iii.
∫
1
e
f
(
1
ln
x
)
d
x
=
1
e
−
1
\begin{array}{l}\text{i. } \int f(x) d x=\ln x+c\\\text{ii. } \int f\left(\frac{1}{x}\right) d x=-\frac{1}{x}+c\\\text{iii. } \int_{1}^{e} f\left(\frac{1}{\ln x}\right) d x=\frac{1}{e}-1\end{array}
i.
∫
f
(
x
)
d
x
=
ln
x
+
c
ii.
∫
f
(
x
1
)
d
x
=
−
x
1
+
c
iii.
∫
1
e
f
(
l
n
x
1
)
d
x
=
e
1
−
1
নিচের কোনটি সঠিক?
A.
i
B.
i ও iii
C.
ii ও iii
D.
i, ii ও iii
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