Terlampir ...slmt mnjwb

Terlampir …slmt mnjwb

$displaystyle rmlim_{ x to9} : frac{ {x}^{2} - x - 72}{ {x}^{2} - 81}$

$displaystyle rmlim_{ x to9} : frac{(x + 8)(x - 9)}{ (x + 9)(x - 9)}$

$displaystyle rmlim_{ x to9} : frac{(x + 8) cancel{(x - 9)}}{ (x + 9) cancel{(x - 9)}}$

$displaystyle rmlim_{ x to9} : frac{(x + 8)}{ (x + 9)}$

$displaystyle rm = frac{(9 + 8)}{ (9+ 9)}$

$boxed{displaystyle rm = frac{17}{18} }$

opsi B

Penjelasan dengan langkah-langkah:

Lim x² – x – 72 (x – 9)(x + 8) (9+8) 17

————— = —————- = ——- = —-

x>9 x² – 81 (x – 9)(x + 9) (9+9) 18

cara kedua pake L'hospital

x² – x – 72 = 2x – 1 2(9)-1 = 17

x² – 81 2x = 2(9) 18