Posted by theophilus on Sunday, July 4, 2010 at 5:36pm.
f' = slope = 4 x -2
so
4x-2 = 2
4 x = 4
x = 1
if x = 1 then
y = 2 -2 + 1 = 1
so tangent at point (1,1) and m = 2
1 = 2 (1) + b
b = -1
so
y = 2 x - 1
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