Tolong bantu kerjain dong kak:( Nomor berapapun

2. komposisi fungsi
f(x) = x - 3
fog(x)= f (g(x))
f(2x+6) = 2x+ 6 - 3
fog(x) = 2x + 3

3. limit
lim(x->∞) √(9x² +1) - √(3x-2)²
lim(x->∞)  √(9x² +1) - √(9x² -12x + 4)
a= 9, b= 0, c = 1
p = 9 , q = -12, r = 4

a= p
limit = (b-q)/ 2√a = (0 - (-12)) / 2√9
limit = 12/ 2(3) = 12/6 = 2

4. y = (3x-1)(2 +x)
u  = 3x -1 --> u' = 3
v = 2 + x --> v' = 1
y' = u'v + uv'
y'= (3)(2+x) + (3x-1)(1)
y' = 6 + 3x + 3x - 1
y' = 6x + 5