liamhallowell28 liamhallowell28

03-02-2019
Mathematics

contestada

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Respuesta :

mathecoach mathecoach

03-02-2019

Answer:

√(7·x + 14) + √(7 - x)

7·x + 14 ≥ 0 --> x ≥ -2

7 - x ≥ 0 --> x ≤ 7

x ∈ [-2 ; 7]

Answer Link

Otras preguntas

Can someone give me a short summary of the book "sounder" by William H, Armstrong?

En Costa Rica, se usa la frase 'pura vida' _____. as the name of a large plate of food that a wife would make for her husband as an expression to show a laid b

following preventive healthcare guidelines how often should an average pet receive a examination

Which of the following properties of soil helps in absorbing contaminants from the soil? a. cation-exchange capacity b. soil reaction c. soil structure d. soil

Which letter in Spanish sounds like the letter Ee

What describes the relationship between men and women as expressed in Stanton’s Declaration of Sentiments? A) separate but equal B) master and servant C) a mut

determine the slope of y=3x^2-8 at (x,y)

Which were not reason(s) for European exploration in the Americas? A. Escape religious persecution B. Wealth and trade C. Power D. Escape econom

How will the level of carbon in the atmosphere change if humans do nothing to reduce their impact on the carbon cycle?

The process of determining the boundaries of districts for the purpose of electing political officials is called