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For a non-zero rational number a ,\ a^7-...

For a non-zero rational number `a ,\ a^7-:a^(12)\ ` is equal to (a)`a^5` (b) `a^(-19)` (c) `a^(-5)` (d) `a^(19)`

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RD SHARMA ENGLISH-POWERS-All Questions
  1. Express the following number in standard form: 6020000000000000 (ii) ...

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  2. Write the following numbers in the usual form: (i)\ 4. 83\ x\ 10^7 ...

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  3. Choose the correct alternative in each of the following : Square of...

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  4. Cube of (-1)/2i s (a)1/8 (b) 1/(16) (c) -1/8 (d) (-1)/(16)

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  5. Which of the following is not equal to ((-3)/5)^4? (a)((-3)^4)/(5^4) ...

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  6. Which of the following is not reciprocal of (2/3)^4? (3/2)^4 (b) ...

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  7. Which of the following numbers is not equal to (-8)/(27)?\ (a)(2/3)...

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  8. (2/3)^(-5) is equal to (a)((-2)/3)^5 (b) (3/2)^5 (c) (2^-5)/3 ...

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  9. ((-1)/2)^5*\ ((-1)/2)^3 is equal to (a)((-1)/2)^8 (b) -\ (1/2)^8...

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  10. ((-1)/5)^3-:((-1)/5)^8 is equal to (a) (-1/5)^5 (b) (-1/5)^(11) ...

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  11. ((-2)/5)^7-:((-2)/5)^5 is equal to (a) 4/(25) (b) (-4)/(25) (c)...

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  12. {(1/3)^2}^4 is equal to (a)(1/3)^6 (b) (1/3)^8 (c) (1/3)^(24...

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  13. (1/5)^0 is equal to (a)0 (b) 1/5 (c)\ 1 (d) 5

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  14. ((-3)/2)^(-1) is equal to (a)2/3 (b) 2/3 (c) 3/2 (d) none ...

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  15. (2/3)^(-5)x\ (5/7)^(-5) is equal to (a)(2/3x5/7)^(-10) (b) (2/3x...

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  16. (3/4)^5-:(5/3)^5 is equal to (a)(3/4-:5/3)^5 (b) (3/4-:5/3)^1\ \ ...

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  17. For any two non-zero rational numbers a and b ,\ a^4-:b^4 is equal to ...

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  18. For any two rational numbers a and b ,\ a^5x\ b^5 is equal to (a\ x...

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  19. For a non-zero rational number a ,\ a^7-:a^(12)\ is equal to (a)a^5 ...

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  20. For a non zero rational numbers a ,\ (a^3)^(-2) is equal to (a)a^6 ...

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