| f(g(x+Δx))−f(g(x)) | ||
limΔx→0 | = | |
| Δx |
| f(g(x+Δx))−f(g(x)) | g(x+Δx)−g(x) | ||
limΔx→0 | |||
| g(x+Δx)−g(x) | Δx |
| f(g(x+Δx))−f(g(x)) | g(x+Δx)−g(x) | |||
limΔx→0 | limΔx→0 | |||
| g(x+Δx)−g(x) | Δx |
| f(g(x+Δx))−f(g(x)) | ||
limΔx→0 | ||
| g(x+Δx)−g(x) |
| f(g(x+Δx))−f(g(x)) | ||
limΔx→0 | = | |
| g(x+Δx)−g(x) |
| f(u+Δu)−f(u) | ||
limΔu→0 | ||
| Δu |