bantu jawab ya teman semuanya

Apl Turunan

1.
s= t² + 2t
v = s'
v(t) = 2t + 2
V(5) = 2(5)+ 2
V(5)= 12 m/s

2.
V = 2t² - 3t + 5
a= V'
a(t) = v'(t)
a(t) =  4t - 3
t =3
a(3) = 4(3 ) - 3
a(3) = 9

3)
persegi panjang
K = 80
2(p+l) = 80
p + l = 40
l= 40 - p

Luas = pl
Luas = p (40 - p)
Luas =40p - p²
Luas maksimum , jik L'  = 0
40 - 2p = 0
2p = 40
p = 20

l = 40 - p
l = 40 - 20
l = 20