find the derivative of √(1 - 2x) by definition of derivative
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Given function is
So,
By using definition of First Principle, we have
On substituting directly h = 0, we get indeterminant form.
So, to solve such type of limits, we use method of Rationalization.
So, on rationalizing the numerator, we get
Hence,
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Question :-
find the derivative of √(1 - 2x) by definition of derivative.
Solution :-
Given :
Then the becomes
Use the first principle
Put the value of f(x) and f(x+h)
When we solve this types of limits we can't directly put h = 0, then we rationalize the denominator.
Hence,
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