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Byju's Answer
Standard VIII
Mathematics
Powers with Negative Exponents
If 3 l × 3 ...
Question
If
3
l
×
3
2
=
3
5
. find the value of
l
.
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Solution
Using the law of exponent, we obtain
3
l
+
2
=
3
5
. But we know that for any
a
≠
0
,
1
,
−
1
, if
a
m
=
a
n
, then
m
=
n
. Hence
l
+
2
=
5
or
l
=
3
.
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