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BSMRSTU-B_13-14
HSC - উচ্চতর গণিত ১ম পত্র
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অধ্যায়-০৯ঃ অন্তরীকরণ
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f
(
x
)
=
1
x
2
f(x)=\frac{1}{x^{2}}
f
(
x
)
=
x
2
1
যেখানে,
x
≠
0
x \neq 0
x
=
0
হলে,
f
40
(
x
)
=
f^{40}(x)=
f
40
(
x
)
=
কত ?
A.
x
−
240
x^{-240}
x
−
240
B.
x
402
x^{402}
x
402
C.
x
240
x^{240}
x
240
D.
x
−
80
x^{-80}
x
−
80
E.
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