express 3√21 in exponential form
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(9
3
)
2
×7
4
=
3
8
×7×3
(9)
3×2
×7
4
=
3
9
×7
9
6
×7
4
=
3
9
9
6
×7
4−1
=
39
9
6
×7
3
=
39
(3
2
)
6
×7
3
=
39
3
12
×7
3
=3
12−9
×7
3
=3
3
×7
3
(21)
3
=21×21×21=9261
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