Trenger hjelp!
Lagt inn: 22/09-2006 13:03
Hmm, denne vakke god:
f(x) = 0.5x[sup]2[/sup] - 2x + 1
f ' (x) = 2*0.5x[sup]2-1[/sup] - 2
f ' (x) = x - 2
f ' (x) = x - 2
f ' (4) = 2 = a (stigningstallet)
f(4) = 1, dvs (X[sub]1[/sub], Y[sub]1[/sub]) = (4, 1)
Y - Y[sub]1[/sub] = a(X - X[sub]1[/sub])
Y - 1 = 2(X - 4)
Y = 2X - 7