katherinep katherinep 22-12-2014 Mathematics Answered 1. For which value of x is the expression log base 4 of (x+3) not defined? a. 0 b. -2 c. 3 d. -4 2. If log 7= a, what is the value of log 490 in terms of a? 3. For what value of k will the graph of y=log base 7 of x contain the point (1,k)?