Lim Han Quan's answer to Lionel Cheah Kai En's Secondary 4 A Maths question.
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The gradients of the tangents should be the same (keyword is parrallel tangents), simply equate the 2 differentiated equations you've got and solve for x.
Whatever x is, it should be the equation already, since vertical line equations are denoted with x=(real number)
Whatever x is, it should be the equation already, since vertical line equations are denoted with x=(real number)
Date Posted:
7 years ago
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