maths

1.check whether root-16/root448 is a rational number or irrational number.
2.if root3=1.732 then find value of square root 3-1/root3+1

  1. 👍 0
  2. 👎 0
  3. 👁 65
asked by dhivya
  1. since √448 = 8√7, which is clearly irrational, then
    -16/8√7 = -2/√7 is clearly irrational

    You probably meant (√3-1)/(√3+1) , but in the outcome it would not make any difference as to irrational vs rational

    (√3-1)/(√3+1)
    = (√3-1)/(√3+1) * (√3-1)/(√3-1)
    = (3 - 2√3 + 1)/(3-1)
    = 2 - √3, which is still irrational

    using your approximate value of √ = appr 1.732
    (√3-1)/(√3+1) = appr 2 - 1.732
    = appr .268

    1. 👍 0
    2. 👎 0
    posted by Reiny

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    Can someone help me reword these two things? I don't like how I did them but I can't think of anything else. Thanks!! 1. PROMPT: What do you do to check whether a number is rational or irrational? In your explanation, use an

    asked by cAt.ExE HaS sTopPeD wORkInG on September 25, 2018
  2. math

    1. Rosa, Roberto, Andrea, and Inno find an estimate for the square root of 10. Who has proposed the best solution? a. Rosa: "Use the sqaure root of 9 and the square root of 25 to estimate." b. Roberto: "I will use the square root

    asked by steve on September 25, 2012
  3. math

    which number has the greatest value? a 3.5 b square root of 15** c square root of 1/16 d 26/100 which number is an irrational number? a 3.5 b square root of 36 c square root of 48 d 37/100*** If a is a rational number and b is an

    asked by rachel on October 27, 2014
  4. 2 Math Questions

    1) What do you do to check whether a number is rational or irrational? Use an example of a rational and an irrational number. 2) How does finding the square root [√] of a number compare to finding the cube root [^3√] of a

    asked by ABCDEFGHIJKLMNOPQRSTUVWXYZ on November 6, 2014
  5. Math-Measure's & area

    1. Find the area of a parallelogram with base b and height h. B=82cm H=16.6cm a.**1,361.2 cm^2 b.6,724 cm^2 c.137.78 cm^2 d.98.6 cm^2 2.Identify all the sets to which the number belongs. Choose from rational number, irrational

    asked by Boby on March 17, 2016
  6. Pre algebra

    which is an example of an integer? -15 3/5 √7 0.252525 Which statement is false? A) Every integer is a real number. B)The number zero is a rational number. C) Every irrational number is a real number. D) Every real number is a

    asked by Alien on February 7, 2019
  7. Algebra

    which of these numbers can be classified as both real and irrational? 1. 5.858585858 2. 63.4 3. root 21 4. root 36 which is both a real number and an integer? 1. 23 2. 1/4 3. root 27 4. 3.402538 which of these number is classified

    asked by Anonymous on October 3, 2016
  8. Math

    What do you do to check whether a number is rational or irrational? In your explanation, use an example of an irrational and a rational number. How does finding the square root of a number compare to finding the cube root of a

    asked by HELP MEEEEE on December 15, 2014
  9. Math

    Using the words listed below fill in the blanks with the correct number type Real Number, Rational Number, Integer, Whole Number, Irrational Number 3) 0.12 - Rational and Real number I am not sure about the rest. Am I correct on

    asked by Patrick on August 28, 2018
  10. 7th grade math Ms.Sue please

    1. Which of these numbers can be classified as both real and irrational? 5.858585858 63.4 square root 21 square root 36 2. Which is both a real number and an integer? 23 1 over 4 square root 27 3.402538 3. Which of these numbers

    asked by Delilah on October 5, 2012

More Similar Questions