yang bisa tolong dong bantuannya....pakai caranya juga ya

6. f'(x) = 1 - 2x
f'(0) = 1 - 2 (0) = 1 - 0 = 1
f'(1/2) = 1 - 2 (1/2) = 1 - 1 = 0
f'(1) = 1 - 2 (1) = 1 - 2= -1
f'(-5) = 1 - 2 (-5) = 1 + 10 = 11

7. f'(x) = 2 (3x(pangkat 2))
f'(-1) = 2 ( 3 (-1) pangkat 2)) = 2 (3 x 1) = 2 x 3 = 6
f'(2) = 2 ( 3 (2) pangkat 2)) = 2 (3 x 4) = 2 x 12 = 24

8. g'(x) = 2x - 4
0 = 2x - 4
2x = 0 + 4
2x = 4
x = 4/2
x = 2