# Intro to Logic (prove sequents)

#### kk12

##### New member
I am stuck on these questions and don't really know how to start/solve them.
prove the following sequent:

1. $(\exists x) Fx \to (\forall x) Gx \vdash (\exists x)(Fx \to (\forall x)Gx)$

2. $(\forall x)(Fx \to (\forall y)\neg Fy) \vdash \neg(\exists x)Fx$

3. $(\exists x)Fx, (\forall x)(Fx \; à \; Gx) \vdash (\exists x)G$

MHB Math Scholar