Hasil dari lim x=9 3-akar x per 81-x^2 = ...

jawab
limit

lim(x ->9)  (3 - √x)/ (81 - x²)

lim(x ->9)  (3- √x)(3 +√x) / (81 -x²) (3 + √x)

lim(x->9)  (9- x)/(9- x)(9+x) (3+√x)

lim(x->9)  1/ (9+x)(3 +√x)
x= 9
limit = 1/ (9+9)(3 +√9) = 1/ (81)(6)
limit = 1/486