Calculus I Proof Question.

1 ) f ( x + 4 ) = f ( x ) $ ( 9) ex, y ER 2 ) + ( X ) = 1 + , s (x ) where eim g (x ) = 1 9Vo Prove f ( 0) exists VIXER 2 f ( RX ) = f( X ) X x) piboat bbo mo al