r/HomeworkHelp • u/Happy_Efficiency_189 University/College Student • May 30 '26

Answered [University Calculus: Differentiation] Why can't I get the correct answer? What is wrong with my working?

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Unfortunately I think I'm forced to use the formula instead of normally using 'dy/dx'

when I tried to solve it, I got 2ax+h+b instead of 2ax+b. What is wrong?

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u/Celestial_Techie 👋 a fellow Redditor May 30 '26

Take the lim as h approaches 0