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Question

find the derivative using first principle eroot x

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Solution

f'x=limh0fx+h-fxh First principleHere, fx=exf'x=limh0ex+h-exhf'x=limh0exex+hex-1hf'x=exlimh0ex+h-x-1hf'x=exlimh0ex+h-x-1x+h-x h×x+h-xf'x=exlimh0ex+h-x-1x+h-x h×x+h-x×x+h+xx+h+xf'x=exlimh0ex+h-x-1x+h-x h×x+h-xx+h+xf'x=exlimh0ex+h-x-1x+h-x ×1limh0x+h+xf'x=ex×1×1x+x limx0ex-1x =1f'x=ex2x

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