Plis dong kaka no 15 aja okee.

LimiT

lim x→0 (cos 2x + 1 – 2 cos x)/x²

= lim x→0 (-2 sin 2x + 2 sin x)/2x

= lim x→0 (-sin 2x/x + sin x/x)

= -2 + 1

= -1