Asked by Kate
                Find the interval on which the curve of y= the integral from 0 to x of 2/(1+3t+t^2)dt is concave up.
I asked this question yesterday and I would like to see if someone could check my answer. I got the curve is concave up when x<-1.5
            
        I asked this question yesterday and I would like to see if someone could check my answer. I got the curve is concave up when x<-1.5
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