Posted by Rory on Tuesday, October 4, 2011 at 4:40am.
dy/dx = 5(4x+3)^4 (4) = 20(4x+3)^4
when x = -1/2
dy/dx = 20(1)^4 = 20
1 = 20((-1/2) + b
1 = -10+b
b = 11
y = 20x + 11
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