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प्रश्न
The expression for 4–3 as a power with the base 2 is 26.
पर्याय
True
False
MCQ
चूक किंवा बरोबर
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उत्तर
This statement is False.
Explanation:
Using law of exponents,
`a^-m = 1/a^m`
∴ `4^-3 = 1/44^3`
= `1/(2^2)^3` ...[∵ 2 × 2 = 4, (am)n = (a)mn]
= `1/(2)^6`
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Predicting the ones digit, copy and complete this table and answer the questions that follow.
| Powers Table | ||||||||||
| x | 1x | 2x | 3x | 4x | 5x | 6x | 7x | 8x | 9x | 10x |
| 1 | 1 | 2 | ||||||||
| 2 | 1 | 4 | ||||||||
| 3 | 1 | 8 | ||||||||
| 4 | 1 | 16 | ||||||||
| 5 | 1 | 32 | ||||||||
| 6 | 1 | 64 | ||||||||
| 7 | 1 | 128 | ||||||||
| 8 | 1 | 256 | ||||||||
| Ones Digits of the Powers |
1 | 2, 4, 8, 6 | ||||||||
- Describe patterns you see in the ones digits of the powers.
- Predict the ones digit in the following:
- 412
- 920
- 317
- 5100
- 10500
- Predict the ones digit in the following:
- 3110
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- 1721
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