Solve the following relations for the value of b.

Question

17. 4ab - 5b = 2a

18. | c - ab | < a 

Express the answer in set-builder notation.

 

 

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Answer 1

17. 4ab - 5b = 2a

 

        b(4a - 5) = 2a

 

                   b = 2a/(4a-5)

 

18. l c - ab l < a

 

      -a < c - ab < a

 

      -a-c < -ab < a-c

 

        c+a > b > c-a

         a                a