Spot the mistake in Differentiation
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Question
Let
find f’(0), if exists.
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“Supposed solution”
For x ¹ 0,
Since does not exist, (see note below)
\ f ’ (0) does not exist.
Anything wrong?
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Note
L = does not exist:
Choose , then
Choose , then
\ L does not exist since “limit, if exists, must be unique.”
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Solution
,
= 0 as
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For smart mathematician like you |
For this function f(x) in this question:
(1) Is f(x) continuous at x = 0?
(2) Is f ’(x) continuous at x = 0?
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