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Byju's Answer
Standard IX
Mathematics
Exponential Representation for Irrational Numbers
If 5x + 1 =...
Question
If
5
x
+
1
=
25
x
−
2
Find the value of :
3
x
−
3
×
2
3
−
x
.
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Solution
5
x
+
1
=
25
x
−
2
⇒
5
x
+
1
=
(
5
2
)
x
−
2
⇒
5
x
+
1
=
5
2
x
−
4
[If bases are equal, powers are also equal]
⇒
x
+
1
=
2
x
−
4
⇒
2
x
−
x
=
4
+
1
⇒
x
=
5
∴
3
x
−
3
×
2
3
−
x
=
3
5
−
3
×
2
3
−
5
=
3
2
×
2
−
2
=
9
×
1
4
=
9
4
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0
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