Let f   : R → R and g   : R → R be respectively given by f x = x + 1 and g x = x 2 + 1…

Let f :RR and g :RR be respectively given by fx=x+1 and gx=x2+1. Define h :RR by hx= maxfx, gxifx 0minfx, gxifx>0
Then number of points at which hx is not differentiable is_________

Solution

hx= x2+1,x -, -1-x+1,x -1, 0x2+1,x 0, 1x+1, x 1, 
Hence, not differentiable at x=-1, 0, 1

Asked in: JEE Advanced 2014 (Paper 1)

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