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## Homework Statement

find the limit if it exist :

lim (1/[x+Δχ] - 1/x) / Δχ

x->0-

## The Attempt at a Solution

lim (1/[x+Δχ] - 1/x) / Δχ => lim -Δχ /(x+ Δx) / Δχ

x->0-

then what ? do i cancel the ΔX in the numerator with that in the denominator ? or whats the next step to solve this problem and did I do any mistake?