nilai limit infinit

lim x→∞ √x²+8x - √x²-4 * √x²+8x + √x²-4 / √x²+8x + √x²-4
= lim x→∞ x²+8x-x²-4 / √x²+8x + √x²+4
= lim x→∞ 8x-4 / √x²+8x + √x²+4
= lim x→∞ 8x/x - 4/x / √x²/x² + 8x/x² + √x²/x² + 4/x²
= 8 / √1 + √1
= 8/2
= 4
(E)

semoga membantu :)