Tolong dong, yang nomor 10 - 11

10. f(x) = 2x+3 / -x + 1
u = 2x + 3
u' = 2
v = -x + 1
v' = -1

f'(x) = u'v - v'u / v²
(2) (-x+1) - (-1) (2x + 3) / (-x + 1)²
-2x + 2 + 2x + 3 / (-x + 1 ) (-x + 1)
2 + 3 / x² - 2x + 1
5 / x² - 2x + 1
f' (2) = 5 / 2² - 2(2) + 1
5 / 4 - 4 + 1
5 / 1
5 (B)
11. A. 22
caranya sama kaya nomor 10