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Solve : 9^(8. 6)xx8^(3. 9)xx72^(4. 4)xx9...

Solve : `9^(8. 6)xx8^(3. 9)xx72^(4. 4)xx9^(3. 9)xx8^(8. 6)=72^?dot`

A

`15.1`

B

`17.9`

C

`20.9`

D

`16.9`

Text Solution

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The correct Answer is:
D
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S CHAND IIT JEE FOUNDATION-POWERS AND ROOTS -SECTION-A (QUESTION BANK-5(A))
  1. Which of the following is not reciprocal of (2/3)^4? (3/2)^4 (b) ...

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  2. [3^(3)+3^(2)+3^(-2)+3^(-3)] is equal to

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  3. Solve : 9^(8. 6)xx8^(3. 9)xx72^(4. 4)xx9^(3. 9)xx8^(8. 6)=72^?dot

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  4. If ((a^(-1)b^(2))/(a^(2)b^(-4)))div((a^(3)b^(-5))/(a^(-2)b^(3)))=a^(x)...

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  5. The expression (p^(-2x)q^(3y))^(6)div(p^(3)q^(-1))^(-4x) after simplif...

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  6. The expression a^((2)/(3)){a^((1)/(3))(a^((1)/(4)))^(4)}^((1)/(4)) is ...

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  7. Evaluate : ((3^(4))^(4)xx9^(6))/((27)^(7)xx3^(9))

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  8. The value of (2^(n+4)-2*2^(n))/(2.2^(n+3))+2^(-3)

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  9. The expression ((x+1/y)^adot(x-1/y)^b)/((y+1/x)^adot(y-1/x)^b) reduces...

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  10. If (p/q)^(r x-s)=(q/p)^(p x-q) , then find the value of xdot

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  11. If (ab^(-1))^(2x-1)=(ba^(-1))^(x-2) then what is the value of x?

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  12. ((2^(m))/(2^(n)))^(t)xx((2^(n))/(2^(t)))^(m)xx((2^(t))/(2^(m)))^(n) is...

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  13. Find the value of x when 4^(2x)=(1)/(32)

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  14. If 2^(x+4)-2^(x+2)=3, then x is equal to

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  15. [1-2(1-2)^(-1)]^(-1)

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  16. In the expression (2^(x)+1)/((7)^(-1)+(2)^(-1))=14, the value of x is

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  17. If m^(n).n^(m)=800, then the value of (n)/(m) is (m < n)

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  18. If a^(2x+2)=1, where a is a positive real number other than 1, then x ...

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  19. If 3^(x)-3^(x-1)=18, then x^(x) is equal to

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  20. If x^(11)=y^(0) and x=2y, then y is equal to

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