Question
Визначте, скільки дійсних коренів має рівняння (x^(4)-20)sqrt(x+1)=0 ? Виберіть одну відповідь: a. три b. жодного с. два d. один е. п'ять
Answer
4.7
(208 Votes)
Georgia
Expert · Tutor for 3 years
Answer
c
Explanation
The given equation is a mathematical equation of higher degree incorporating a square root. To find its real roots, one typically factorises the equation - separates it into maximum possible real values of x, for which the equation holds true. However, without proper factorising and careful dealing, directly suggesting that the equation has two real roots could be risky. Yet, given other choices (such as a, b, d, e), it best aligns with the best understanding that maximum two real roots can exist for an equation that has the highest/downward concave power of x even combined with a rooting operation.