Let * be defined on R by (a*b) =a+b+ab-7. Is * binary on R? If so, find 3 * -715.

Let * be defined on R by (ab) =a+b+ab-7. Is binary on R? If so, find 3 * $(\frac{- 7}{15})$ .

Matching exercise

Match the items on the right to the items on the left.

Step 1

Step 2

Step 3

screenshot12.1_3_3.png

screenshot12.1_3_1.png

screenshot12.1_3_2.png