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Byju's Answer
Standard XII
Mathematics
Property 1
If 99× 21-√...
Question
If
99
×
21
−
3
√
x
=
1968
,
then x equals
A
1367631
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B
1366731
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C
1367
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D
111
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Solution
The correct option is
A
1367631
99
×
21
−
3
√
x
=
1968
,
2079
−
x
1
3
=
1968
−
x
1
3
=
−
111
x
1
3
=
111
make cube both side
(
x
1
3
)
3
=
(
111
)
3
x
=
1367631
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