In the group Q- 1 under the binary operation * defined by a * b=a+b+a b the inverse of 10 is

Step-by-step solution

Let the inverse element of 10 be e , then a * e=0 Therefore, 10 e=10+e+10 e=0 10+11 e=0 array rr & 11 e=-10 & e= -10 11 array