SOLUTION: please help me solve this: 1.(F v G) > (H & I) 2. I > K 3.~k.: ~F

The word is "prove", not "solve"

 1. (F v G) > (H & I)
 2. I > K
 3. ~K.       : ~F

 4. ~I        2,3, Modus tollens
 5. ~I v ~H   4, Addition
 6. ~H v ~I   5, Commutation
 7. ~(H & I)  6, DeMorgan
 8. ~(F v G)  1,7, Modus tollens
 9. ~F & ~G   8, DeMorgan
10. ~F        9, Simplification

Edwin