f(x)=x−[x]=x
g(x)=1−x+[x]=1−x
Now, Graph of min f(x),g(x)

Clearly graph is continuous in [−2,2] but non differentiable at 7 points (i.e. greater than 4) in (−2,2)
JEE Main 2021 — Mathematics Calculus
Let [t] denote the greatest integer less than or equal to t.
Let f(x)=x−[x],g(x)=1−x+[x], and h(x)=minf(x),g(x),x∈[−2,2]. Then h is :
Held on 26 Aug 2021 · Verified 6 Jul 2026.
continuous in [−2,2] but not differentiable at more than four points in (−2,2)
Continous in [−2,2] but not differentiable at exactly three poionts in (−2,2)
not continuous at exactly four points in [−2,2]
not continuous at exactly three points in [−2,2]
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