| cos3x−1 | −3sin3x | |||
lim x→0 | =H limx→0 | = | ||
| x2*cos(3x) | 2x*cos3x−3x2sin(3x) |
| −3sin3x | 3 | 9 | ||||
=limx→0 | =−3* | =− | ||||
| 3x*(23cos3x−xsin3x) | 2 | 2 |
| cos(3x)−1 | ||
limx→0 | ||
| x2cos(3x) |
| (cos(3x)−1)(cos(3x)+1) | ||
limx→0 | ||
| x2cos(3x)(cos(3x)+1) |
| cos2(3x)−1 | ||
limx→0 | ||
| x2cos(3x)(cos(3x)+1) |
| −sin2(3x) | ||
limx→0 | ||
| x2cos(3x)(cos(3x)+1) |
| sin2(3x) | −9 | ||
limx→0 | |||
| 9x2 | cos(3x)(cos(3x)+1) |
| sin2(3x) | −9 | |||
limx→0 | limx→0 | |||
| (3x)2 | cos(3x)(cos(3x)+1) |
| −9 | 9 | |||
=12*( | )=− | |||
| 1*(1+1) | 2 |