bantu saya besok dikumpulkan

a. lim x mendekati 5
x^2 -25 / x^2 +x-30
= (x-5) (x+5) / (x+6) (x-5)
= x+5 / x+6
= 5+5 / 5+6 = 10/11
b. lim x mendekati 1/2
2x-1 / 4x^2 -1
= 2x-1 / (2x-1) (2x+1)
= 1 / 2x+1
= 1 (2(1/2)+1) = 1/2
c. maaf gak ketemu