427. How many real roots does th e e 1uatione^x-9e^(-x)+8=0have? B(A)0(B) 1(C)2(D)4(E)Infinitely many 相关知识点: 试题来源: 解析 BMultiply both sides of the equation by e^x and rearrange terms to obtain the equation e^(2x)+8e^x-9=0 . Let u=e^x and so...
(C) Between any two roots of excosx=1, there exists at least one root of exsinx=1. (D) Between any two roots of exsinx=1, there exists at least one root of excosx=1. View Solution [x2]=x+1 how many real roots View Solution Find the number of solution of the equation esin...
How do you use the discriminant to find out how many real number roots a2+12a+36=0 has?Use of the Discriminant:The discriminant of a quadratic equation is used to determine the number and the nature of the roots. The discriminant is denoted by the alphabet ...
How many real square roots does -64 have?The Square Roots of Negative Numbers:Like all other numbers, negative numbers have square roots. The numeric value of the square root of a negative number is the same numeric value as the square root of a positive number, but it will incorporate th...
In between any two real roots of an e^x sin x=1 there exists how many roots satisfying equation e^x cos x = -1
Find the values for k for which the equation x^2 - 4x + 5k will have no real roots. How many real roots does the equation x^5 + 3x + 5 = 0 have ? How many real roots are there for the equation x^2 + 3x -1 ? Write a polynomial that has the given number as roots. -3,...
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I realize this is a correct solution, however i want my result to be real - is there a way to tell Matlab to always return the real cube root? These imaginary ones are messing up my expressions... (Also i wonder why matlab chooses to consider one of two complex r...
Unlikequadratic functions, which always are graphed as parabolas,cubic functions take on several different shapes. We can figure out the shape if we know how manyroots,critical pointsandinflection pointsthefunctionhas. A cubic function with three roots (places where it crosses the x-axis). ...