The combination a consists of the solution of the equation AX & # 178; - 2x + 1 = 0. 1. If the set a is an empty set, find the value range of the real number a 2. If there is only one element in the set a to find the value of a, I hope you can help me. I'm not good at math. I'm a beginner

The combination a consists of the solution of the equation AX & # 178; - 2x + 1 = 0. 1. If the set a is an empty set, find the value range of the real number a 2. If there is only one element in the set a to find the value of a, I hope you can help me. I'm not good at math. I'm a beginner

Empty set means that the original equation has no solution, that is, the discriminant is less than 0
There is only one element, that is, there is only one solution, that is, the discriminant is equal to 0
Y = ax ^ 2 + BX + C discriminant △ = B ^ 2-4ac