Determine whether each statement is true or false:
a. for all real numbers x, there exists a real number y such that ? ? ? 5 ? ? ? 1 = 0 is true.
b. there exists a real number x, such that for all real numbers y, ? ? ? 5 ? ? ? 1 = 0 is true.
13. determine whether each statement is true or false:
a. ? ? ? ? ? ? = ? ? + 1.
b. ? ? ? b ? ? ? b, ? ? ? b ? ? = ? ? ?