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JEEMAIN and NEET
>>
Mathematics
>>
Class11
>>
Sequence and Series
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Q)
α
&
β
are +ve roots of
x
2
−
2
a
x
+
a
b
=
0
then for
n
∈
N
(
0
<
b
<
a
)
S
n
=
1
+
2
(
b
a
)
+
3
(
b
a
)
2
+
.
.
.
+
n
(
b
a
)
n
−
1
can not exceed .
(
a
)
α
β
(
b
)
β
α
(
c
)
|
α
+
β
α
−
β
|
(
d
)
(
α
+
β
α
+
β
)
4
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