bantu jawab no. 11 yaa

Kelas 11 Matematika
Bab Limit

lim ((tan x - tan y)/((2 - 2x/y) (tan x . tan y + 1))
x→y

= lim ((1/((2y - 2x)/y)) . (tan (x - y))
...x→y

= lim ((-y/2) . ((tan (x - y))/(x - y))
...x→y

= -y/2