In this video, Prof. Happy Strawberry from the F.I.T. Department of Mathematics solves another limit using the conjugate trick , but with a slightly different structure:
\lim_{x\to 1}\frac{1-\sqrt{x}}{1-x}
We start with direct substitution and again get the indeterminate form 0/0.
This time, the square root appears in a different position, but the same strategy applies:
Multiply by the conjugate
We go step by step:
* Identify the conjugate 1 + \sqrt{x}
* Multiply numerator and denominator
* Use the difference of squares
* Cancel the common factor
* Simplify and evaluate
This example shows that the conjugate method works even when the expression looks reversed.
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Limit Using Conjugates: Flipped Square Root Case, Limit Using Conjugates Playlist | NatokHD