Find the cube roots of 8000,729,343,-512,-2744,32768 Solve the sum in cube roots.
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Answer:
Factorize all by the method of LCM.
2 | 8000
2 | 4000
2 | 2000
2 | 1000
2 | 500
2 | 250
5 | 125
5 | 25
5 | 5
| 1
8000 = 2^6 x 5^3.
∛8000 = 2^2 x 5^1 = 4 x 5 = 20
3 | 729
3 | 243
3 | 81
3 | 27
3 | 9
3 | 3
| 1
729 = 3^6
∛729 = 3^2 = 9
7 | 343
7 | 49
7 | 7
| 1
343 = 7^3
∛343 = 7
-2 | -512
-2 | 256
-2 | -128
-2 | 64
-2 | -32
-2 | 16
-2 | -8
-2 | 4
-2 | -2
| 1
-512 = (-2)^9
∛-512 = (-2)^3 = -8
-2 | -2744
-2 | 1372
-2 | -686
7 | 343
7 | 49
7 | 7
| 1
-2744 = (-2)^3 x 7^3
∛-2744 = (-2) x 7 = -14
2 | 32768
2 | 16384
2 | 8192
2 | 4096
2 | 2048
2 | 1024
2 | 512
2 | 256
2 | 128
2 | 64
2 | 32
2 | 16
2 | 8
2 | 4
2 | 2
| 1
32768 = 2^15
∛ 32768 = 2^5 = 32
Hope this will be helpful.
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