Answer :

If the tangent is parallel to y-axis it means that it’s slope is

not defined or 1/0.




2y – 4 = 0 y = 2


x2 + (2)2 – 2x – 4(2) + 1 = 0


x2 – 2x – 3 = 0


x = 3 and x = -1


So, the requied points are (-1, 2) and (3, 2).


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