รากที่สาม

ร า ก ที่ ส า ม



.
6310121204027

1 2565

4092107
.

1. 1
2. 1
3
2.1 3
2.2 5
10
14

1

33 3
1. aa

aa

a
=a

1) 8 1 =2
2) 125 =5
3) -343 23 8 = -7
82

53 125
125 5

(-7)3 -343
-343 -7

2

4) 0.216 (0.6)3 0.216 = 0.6
5) 0 0.216 0.6
6) 59
03 0 =0
00

59

59

2

=6
=6

3

= -4
= -4

4
=
=
=

=

3

5
63

63
6

=3
= -3

2.
2.1

1
=
=

= 30
= 30

4

2
=
=

= 33
= 33

3
=
=
=

=
=

4
=

= -1.1
= -1.1

5

2.2
1 100

6

7

8

9

1 483 483 = 110,592
n = 48

483 = 110,592

2 3.684

n = 50
3.684

3 n 3.634
n = 48 3.634 n = 48

4 n n3 = 132,651

513 = 132,651 n = 51 n3
n = 51

5 n3 = 117,649 n3

493 = 117,649 n = 49
n = 49 3.659

3.659

6 ( 3.634)

=
5 (-3.634)
-18.17
-18.17

1. 1 10
1)
2) 6) 2
3) 7)
4) 8) 29.67
9) = -20
5) 10)
2. 1 1 -1
512 8 =
0.343 -0.7
173 = 51
= 36
5) =

2 11

1. (100)3 2
2. (0.9)3 A.) 14
3. B.)
4. C.) 106
5. D.) 12
6. E.)
7. F.) 0.729
8. G.) 0
H.) 10-1

3 12

() 2

1.
1) 512

2) -3,375

3) 0.000064

4) -0.343

5)

4 13

2

1)

2) +

3) n3 n = 27

4) n 2.520

5) n n3 = 614,125

6)

7)

14

. 2 2[ ]. 2552,
2565]
: http://academic.obec.go.th/textbook/web/images/book/1552355345_example.pdf [13 2565]

. .2 [ ]. . . ., :

https://kanchit004.files.wordpress.com/2010/11/e0b8a0e0b8b2e0b884e0b89ce0b899e0b8a7e0b8811.pdf [13