Tolong bantu no 2 dan 4, mau di kumpulkan

Jawaban:

2. m= y

m = 2x +2

m = 2.1 + 2= 4

persamaan garis singgung

y-y1 = m(x-x1)

y-2 = 4 (x-1)

y-2 = 4x-4

y= 4x -2

4. P(x) = 400 + 18x – 3x²

P(x) =0

18 -6x = 0

x= 3

P(3) = 400 + 18.3 -3.3²

P(3) = 400 + 54 -27 = 427

Untung = Rp 427.000