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Find, and determine the nature of, the turning points of the curve given by

y=x2+1x+1,x≠−1

If the local minimum point is (x0,y0) and the local maximum point is (x1,y1), then the number

x0+2y0+3x1+4y1

can be expressed in simplest form as

a+b2,a,b∈Z

Give a+b