lim x→7 2 - √x-3 / x^2 - 49

turunan
yg atas diturunin
2 - (x - 3)^1/2 = - (1/2)(1)(x - 3)^(1/2-1)
= -1/2(x - 3)^-1/2 = -1 / 2√(x - 3)
nah kita kerjakan
-1 / 2√(x - 3)
----------------
2x
masukan x = 7
-1 / 2√(7 - 3)
----------------
2(7)

-1 / 2√4
-----------
14

-1/4
------
14

= -1/4 × 1/14 = - 1/56