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What will come in place of both the question marks in the following question? `((?)^(2//3))/(42)=5/((?)^(1//3))` a. `10` b. `20` c. `sqrt(20)` d. `10sqrt(2)` e. `210`

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RS AGGARWAL-SURDS AND INDICES-All Questions
  1. (1/2)^(-1/2) is equal to 1/(sqrt(2)) b. 2sqrt(2) c. -sqrt(2) d. sqrt(2...

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  2. Simplified form of [(root(5)(x^(-3//5)))^(-5//3)]^5 is a. 1/x b. x c. ...

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  3. What will come in place of both the question marks in the following qu...

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  4. The value of 5^(1//4)xx(125)^(0.25) is: a. sqrt(5) b. 5 c. 5sqrt(5) d....

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  5. The value of 1/((216)^(-2//3))+1/((256)^(-3//4))+1/((32)^(-1//5)) is a...

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  6. (2. 4xx10^3)-:(8xx10^(-2))=? 3xx10^(-5) b. 3xx10^4 c. 3xx10^5 d. 30

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  7. (1/216)^(-2//3)-:(1/27)^(-4//3)=? a. 3/4 b. 2/3 c. 4/9 d. 1/8

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  8. (48)^(-2/7)xx(16)^(-5/7)xx(3)^(-5/7)=? 1/3 b. 1/(48) c. 1 d. 48

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  9. If 10^x=1/2, then 10^(-8x)=? a.1/(256) b. 80 c. 16 d. 256

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  10. If (3/5)^3(3/5)^(-6)=(3/5)^(2x-1), then x is equal to a. -2 b. -1 c. 1...

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  11. 49xx49xx49xx49=7^? 4 b. 7 c. 8 d. 16

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  12. The value of (8^(-25)-8^(-26)) is a. 7xx8^(-25) b. 7xx8^(-26) c. 8xx8^...

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  13. (64)^(-1/2)-(-32)^(-4/5)=? 1/8 b. 3/8 c. 1/(16) d. 3/(16) e. none of...

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  14. (a/b)^(x-1)=(b/a)^(x-3), then the value of x is 1/2 b. 1 c. 7/2 d. 2

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  15. If 2^(2n-1)=1/(8^(n-3)), then the value of n is a. -2 b. 2 c. 0 d. 3

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  16. If 5^a=3125, then the value of 5^(a-3) is a. 25 b. 125 c. 625 d. 1625

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  17. If 5sqrt(5)xx5^3-:5^(-3//2)=5^(a+2), then the value of a is a. 4 b. 5 ...

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  18. If sqrt(2^n)=64 , then the value of n is 2 b. 4 c. 6 d. 12

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  19. If (sqrt(3))^5xx9^2=3^nxx3sqrt(3), then the value of n is a. 2 b. 3 c....

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  20. If (9^n xx 3^5 xx 27^3)/(3 xx (81)^4) = 27, then n equals

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