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 |