tolong koreksi kak...

soal no.4 mungkin salah
6) limit {3 - V(4x + 1)/(x -2)
= limit {3-V(4x+1)(3+V(4x+1) /(x-2){3+V(4x+1) }
=limit { 9 - (4x+1) } / (x-2){ 3+V(4x+1) }
= limit (9 - 4x -1) / (x -2) { 3 +V(4x+1) }
= limit (-4x + 8) / (x -2) { 3 + V(4x+1) }
= limit -4(x -2) / (x - 2) { 3 + V(4x+1) }
= -4 limit (x -2) / (x -2) { 3 + V(4x+1) }
= -4 limit 1 / { 3 + V(4x+1) }
= -4 / { 3 + V(4.2 + 1)
= -4 / ( 3 + V9)
= -4 / (3 + 3)
= -4/6
= -2/3