simplify
L-81 x 9 + L-8Jxz
Answers
Answered by
0
Answer:
Step-by-step explanation:
x
2
−
81
9
−
x
x
+
9
)
(
x
−
9
)
9
−
x
Answered by
0
Answer:
The value of x is \frac{2}{5}
5
2
.
Step-by-step explanation:
The given equation is
(81)^x=\frac{9}{3^x}(81)
x
=
3
x
9
It can be written as
(3^4)^x=\frac{3^2}{3^x}(3
4
)
x
=
3
x
3
2
3^{4x}=3^{2-x}3
4x
=3
2−x
[\because \frac{a^m}{a^n}=a^{m-n}][∵
a
n
a
m
=a
m−n
]
On comparing both the sides, we get
4x=2-x4x=2−x
4x+x=24x+x=2
5x=25x=2
x=\frac{2}{5}x=
5
2
Therefore the value of x is \frac{2}{5}
5
2
.
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