Tolong bantu jawabannya teman teman​

Penjelasan dengan langkah-langkah:

a. f(x)= 12

f'(x)= 0

b. f(x)= x²+6x+5

f'(x)= 2x+6

c. f(x)= 2x(3x–2)⁵

u=2x, v = (3x–2)⁵

u'= 2 , v'= 5(3)(3x–2)⁴

f'(x)= u'v+uv'

= 2(3x–2)⁵+2x(15)(3x–2)⁴

= 2(3x–2)⁵+30x(3x–2)⁴

atau (3x–2)⁴(2+30x(3x–2))

= (3x–2)⁴(2+90x²–60x)

= (3x–2)⁴(90x²–60x+2)

d. f(x)= (x-3)(x+5)

f'(x)= uv'+u'v

u= (x-3)

u'= 1

v= (x+5)

v'= 1

maka f'(x)= (x-3)+(x+5)

= 2x+2 ✓

e. f(x)= (7x²+8)/2x+5

u= 7x²+8

u'= 14x

v= 2x+5

v'= 2

f'(x)= (uv'-u'v)/v²

= (7x²+8)(14x)–2(2x+5))

(2x+5)²

= (98x³+112x)–(4x-10))

(2x+5)²

= (98x³+108x+10)

(2x+5)²