Arre beta, this modulus function is just like my steel tiffin carriers — solid and reliable everywhere, never breaking its path, that’s why continuous. But at zero, it’s like a sharp corner, just like when you try to change directions too fast with a heavy tiffin stack — it gets a sudden jerk! So differentiable nahi hai wahan. Sun na, I see this in my daughter's JEE coaching notes every night, where she draws that sharp 'V' graph and explains it to me while I pack kusli.
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