Question 1185281
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Prove algebraically that the sum of two odd functions is an even function.
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This statement  CAN  NOT  be  proved,  since it is  WRONG.



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It is really interesting:   the sum of two odd integer numbers is an even integer number.



But the sum of two odd function is an odd function,  again  ( ! )



Thus the situation with functions  IS  NOT  THE  SAME  as with integer numbers  ( ! )   ( ! )




                    In  Math,  it is very important to know every subject 

            from  " a "  to  Z  and do not miss the properties of different subjects  ( !  !  !  )