Home
Class 10
MATHS
If log(2)x + log(2)x=7, then =...

If `log_(2)x + log_(2)x=7`, then =

A

`1.21`

B

`1.40`

C

`11.31`

D

`18.52`

Text Solution

Verified by Experts

The correct Answer is:
C

`log_(2)x +log_(2)x=7`
`2log_(2)x=7`
`log_(2)x=3.5`
`x=2^(3.5)~~11.31`
Promotional Banner

Topper's Solved these Questions

  • PLANE GEOMETRY

    KAPLAN|Exercise PLANE GEOMETRY FOLLOW - UP TEST|6 Videos
  • PRACTICE TEST 2

    KAPLAN|Exercise PRACTICE TEST|50 Videos

Similar Questions

Explore conceptually related problems

If log_(y)x +log_(x)y = 7 , then the value of (log_(y)x)^(2) +(log_(x)y)^(2) , is

If log_(2) x xx log_(3) x = log_(2) x + log_(3) x , then find x .

If log_(a)5=x and log_(a)7=y , then log_(a)sqrt(1,4)=

If log_(175)5x=log_(343)7x , then the value of log_(42)(x^(4)-2x^(2)+7) is

If log_y x +log_x y=7, then the value of (log_y x)^2+(log_x y)^2, is

If log_(2)(log_(2)(log_(2)x))=2 , then the number of digits in x, is (log_(10)2=0.3010)

If sum log_(2)x+log_(4) x + log_(16) x + log_(256) x + …=6, then find the value of x.

If log_(2)(log_(2)(log_(3)x))=log_(3)(log_(3)(log_(2)y))=0 , then x-y is equal to :

If xy^(2) = 4 and log_(3) (log_(2) x) + log_(1//3) (log_(1//2) y)=1 , then x equals

KAPLAN-PRACTICE TEST 1 -PRACTICE TEST
  1. Which of the following polynomials, when divided by 3x+4, equals 2x^(2...

    Text Solution

    |

  2. Let |x| be defined to be the ''floor'' of x, where |x| is the greates...

    Text Solution

    |

  3. If log(2)x + log(2)x=7, then =

    Text Solution

    |

  4. If f(x)=(sqrt(x-1))/(x), what is the domain of f(x) ?

    Text Solution

    |

  5. How many ways can 2 identical red chairs and 4 identical blue chairs b...

    Text Solution

    |

  6. If a+b gt 0 and c+d gt 0, which of the following must be true ?

    Text Solution

    |

  7. If x gt 0, a = x cos theta, and b = x sin theta, then sqrt(a^(2)+b^(2)...

    Text Solution

    |

  8. If 0^(@)lt x lt 90^(@) and 5 sin^(2)x = 7 sin x - 2, what is the vlaue...

    Text Solution

    |

  9. 3-2i and 3+2i are roots to which of the following quadratic equations ...

    Text Solution

    |

  10. If point P is located on the unit circle, then x+y=

    Text Solution

    |

  11. If 0 le t le 1, which of the following graphs is the graph of y versus...

    Text Solution

    |

  12. If isosceles right triangle ABC and square ACDE share side AC, what is...

    Text Solution

    |

  13. Which of the following denotes the correct vector artithmetic ?

    Text Solution

    |

  14. The horizontal distance, in feet, of a projectile that is fired with a...

    Text Solution

    |

  15. If a right circular cone has a lateral surface area of 6pi and a slant...

    Text Solution

    |

  16. If two fair dice are tossed, what is the probability that the two numb...

    Text Solution

    |

  17. Which of the following is an equation of the ellipse centered at (-2, ...

    Text Solution

    |

  18. If f(x)ge 0 and g(x)ge 0 for all real x, which of the following statem...

    Text Solution

    |

  19. Where defined, (1-sin theta)/(1-cos theta)=

    Text Solution

    |

  20. sum(k=0)^(5)(-1)^(k)2k

    Text Solution

    |