Home
Class 11
MATHS
If (log)3y=xa n d(log)2z=x , find 72^x i...

If `(log)_3y=xa n d(log)_2z=x ,` find `72^x` in terms of `ya n dzdot`

A

`yz^(3)`

B

`y^(2)z^(3)`

C

`y^(3)z^(2)`

D

`y^(3)z^(3)`

Text Solution

AI Generated Solution

The correct Answer is:
To solve the problem of finding \( 72^x \) in terms of \( y \) and \( z \), we can follow these steps: ### Step 1: Express \( 72 \) in terms of its prime factors We can express \( 72 \) as: \[ 72 = 9 \times 8 \] This can also be written in terms of its prime factors: \[ 72 = 3^2 \times 2^3 \] ### Step 2: Write \( 72^x \) using the prime factorization Now, we can express \( 72^x \) as: \[ 72^x = (3^2 \times 2^3)^x = 3^{2x} \times 2^{3x} \] ### Step 3: Use the given logarithmic equations We have the equations: \[ \log_3 y = x \quad \text{and} \quad \log_2 z = x \] From these, we can express \( y \) and \( z \) in terms of \( x \): \[ y = 3^x \quad \text{and} \quad z = 2^x \] ### Step 4: Substitute \( 3^{2x} \) and \( 2^{3x} \) in terms of \( y \) and \( z \) Now, we can express \( 3^{2x} \) and \( 2^{3x} \): \[ 3^{2x} = (3^x)^2 = y^2 \] \[ 2^{3x} = (2^x)^3 = z^3 \] ### Step 5: Combine the expressions Substituting these back into the expression for \( 72^x \): \[ 72^x = 3^{2x} \times 2^{3x} = y^2 \times z^3 \] ### Final Result Thus, we have: \[ 72^x = y^2 z^3 \]

To solve the problem of finding \( 72^x \) in terms of \( y \) and \( z \), we can follow these steps: ### Step 1: Express \( 72 \) in terms of its prime factors We can express \( 72 \) as: \[ 72 = 9 \times 8 \] This can also be written in terms of its prime factors: ...
Promotional Banner

Topper's Solved these Questions

  • LOGARITHMS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Section I - Solved Mcqs|70 Videos
  • LOGARITHMS

    OBJECTIVE RD SHARMA ENGLISH|Exercise Section II - Assertion Reason Type|8 Videos
  • INEQUALITIES

    OBJECTIVE RD SHARMA ENGLISH|Exercise EXERCISE SECTION-II (Assertion-Reason )|1 Videos
  • MATRICES

    OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|30 Videos

Similar Questions

Explore conceptually related problems

If (log)_3y=xa n d(log)_2z=x , find 72^x in terms of yand zdot

If log_(3) y = x and log_(2) z = x , " find " 72^(x) in terms of y and z.

y=2^(1/((log)_x4) , then find x in terms of y.

Given log x = 2m - n, log y = n - 2m and log z = 3m - 2n, find in terms of m and n, the value of "log" (x^(2)y^(3))/(z^(4)) .

If log_(2) x = a and log_(3) y = a , write 72^(@) in terms of x and y.

If log_(5) x = a and log_(2) y = a ," find "100^(2a-1) in terms of x and y .

if log_2(log_3(log_4x))=0 and log_3(log_4(log_2y))=0 and log_3(log_2(log_3z))=0 then find the sum of x, y and z is

Given : log_(3) m = x and log_(3) n = y (i) Express 3^(2x - 3) in terms of m. (ii) Write down 3^(1 - 2y + 3x) in terms of m and n. (iii) If 2 log_(3) A = 5x - 3y , find A in terms of m and n.

OBJECTIVE RD SHARMA ENGLISH-LOGARITHMS-Chapter Test
  1. If (log)3y=xa n d(log)2z=x , find 72^x in terms of ya n dzdot

    Text Solution

    |

  2. If x^((3)/(2)("log"(2) x-3)) = (1)/(8), then x equals to

    Text Solution

    |

  3. If "log"(4)(3x^(2) +11x) gt 1, then x lies in the interval

    Text Solution

    |

  4. If "log"(6) (x+3)-"log"(6)x = 2, then x =

    Text Solution

    |

  5. If 2^(x).9^(2x+3) = 7^(x+5), then x =

    Text Solution

    |

  6. The solution of the equation (log)7(log)5(sqrt(x+5)+sqrt(x)=0 is...

    Text Solution

    |

  7. If "log"(6) {"log"(4)(sqrt(x+4) + sqrt(x))} =0, then x =

    Text Solution

    |

  8. If x^("log"(x)(x^(2)-4x +5)) = (x-1), then x =

    Text Solution

    |

  9. If "log"(3) {"log"(6)((x^(2) +x)/(x-1))} =0 then x =

    Text Solution

    |

  10. If "log"(8){"log"(2) "log"(3) (x^(2) -4x +85)} = (1)/(3), then x equal...

    Text Solution

    |

  11. If x = "log"(2) 3 " and " y = "log"(1//2) 5, then

    Text Solution

    |

  12. If "log"(x+2) (x^(3)-3x^(2)-6x +8) =3, then x equals to

    Text Solution

    |

  13. If (2.3)^x=(0.23)^y=1000, then find the value of 1/x-1/y.

    Text Solution

    |

  14. If 10^(x-1) + 10^(-x-1) = (1)/(3), then x equals to

    Text Solution

    |

  15. (log)2(log)2(log)3(log)3 27^3 is 0 b. 1 c. 2 d.\ 3

    Text Solution

    |

  16. If 2"log"(8) a =x, "log"(2) 2a = y " and " y-x =4, then x =

    Text Solution

    |

  17. If "log"(10) x =y, " then log"(10^(3))x^(2) equals

    Text Solution

    |

  18. If "log"(3) x xx "log"(x) 2x xx "log"(2x)y ="log"(x) x^(2), then y equ...

    Text Solution

    |

  19. The number of solutions of "log"(2) (x-1) = 2 "log"(2) (x-3) is

    Text Solution

    |

  20. If (1)/("log"(3) pi) + (1)/("log"(4) pi) gt x, then the greatest integ...

    Text Solution

    |

  21. Let x in(1,oo) and n be a positive integer greater than 1. If fn (x) =...

    Text Solution

    |