plzzzz answer this question:1/4-5/4.8+5.7/4.8.12- .........if anybody answer this with correct process I will surely follow them and mark as brainliest answer
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Answer:
We know,
(1−x)
−n
=1−n(−x)+
2!
−n(−n−1)x
2
...∞=1+nx+
2!
n(n+1)x
2
...∞
Comparing the coefficients with that given in the question, we get.
⇒ nx=
4
1
...(i)
⇒
2
n(n+1)x
2
=
8
1
...(ii)
Substituting the value of nx from Eq (i) in Eq (ii), we get
8nx
2
(n+1)=2
4nx(n+1)x=1
(n+1)(x)=1
nx=1−x
4
1
=1−x
x=
4
3
Since nx=
4
1
n=
3
1
Substituting in the original equation, the values of n and x, we get
⇒(1−
4
3
)
3
−1
=(4
−1
)
3
−1
=(4
3
1
)
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