People's Education Press High School Mathematics Compulsory Course 1 Class 6 Function Definition Domain Question Answers.

The domain is all real numbers, that is to say, ax 2-ax+1/a must be a constant greater than or equal to 0.

So a is greater than 0.

If square B minus 4ac is less than 0, it means that no matter what X is taken, ax2-ax+ 1/a(a is greater than 0) is a number greater than 0.

When square B minus 4ac equals 0, it means that no matter what X takes, ax2-ax+ 1/a(a is greater than 0) is a number greater than or equal to 0.

So you have to calculate that B minus 4ac is less than or equal to 0, and A is greater than 0.

(Subtracting 4ac from Party B means treating the equation as AX 2+BX+C and then doing it, which is △).