微积分concave up and downf(x)=(x^2)/(x^2+3)(c) On what interval(s) is f concave upward?On what interval(s) is f concave downward?What are the x-coordinate(s) of the inflection point(s) of

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微积分concave up and downf(x)=(x^2)/(x^2+3)(c) On what interval(s) is f concave upward?On what interval(s) is f concave downward?What are the x-coordinate(s) of the inflection point(s) of

微积分concave up and downf(x)=(x^2)/(x^2+3)(c) On what interval(s) is f concave upward?On what interval(s) is f concave downward?What are the x-coordinate(s) of the inflection point(s) of
微积分concave up and down
f(x)=(x^2)/(x^2+3)
(c) On what interval(s) is f concave upward?
On what interval(s) is f concave downward?
What are the x-coordinate(s) of the inflection point(s) of

微积分concave up and downf(x)=(x^2)/(x^2+3)(c) On what interval(s) is f concave upward?On what interval(s) is f concave downward?What are the x-coordinate(s) of the inflection point(s) of
y = f(x) = x²/(x²+3)
On what interval(s) is f concave upward?     Answer: [-0.5,0.5]
On what interval(s) is f concave downward?    Answer: (-∞,-0.5] and [0.5, ∞) 
What are the x-coordinate(s) of the inflection point(s) of f? 
Answer: f(x) is an even function. Therefore f(x)=-f(x) for all x. 
Please see the proof from the figure later on.

微积分concave up and downf(x)=(x^2)/(x^2+3)(c) On what interval(s) is f concave upward?On what interval(s) is f concave downward?What are the x-coordinate(s) of the inflection point(s) of concave 微积分求Concave up和Concave down是不是二次求导后设它等于0,我算到正负(44/242)^(1/2),但不知道区间范围,又不知道有没有算错.还要求垂直渐近线和水平渐近线分别是多少 Do what you have said,and never give up英译中 Do you like taking a l_____to go up and down The greatest difficulty and do not give up,give up only to fail If you keep your head up high and never give up,you can do anything up and up and up and you are patient and do not like give up easily为什么用do Do you sometimes feel uncomfortable up and down your neck and lower back Do you sometimes feel uncomfortable up and down your neck and lower back?中文意思 英语翻译I get up early every day ,do some exerciseI get up early and do some exercise every day.I get up early every day,make the movement exercise bodyI get up early and do exercise everyday.哪个对 Do we need never give up?It's widely accepted that never give up,a strong and positive life attitu do some exercise是什么意思还有put your feet togetherjump up and down multiply your death divide by sex add up the violence and what do you get? Every morning I get up at seven I do some ____ and have a light breakfast