1/a+ 1/b+ 1/c = 1

Try these numbers: A = 2, B = 3 and C = 6.

Isn't the process as simple as possible? You don't need to use any formula, a simple method of solving problems is a good method!

This is a trial, a purposeful trial, not what you said.

The purpose of the exam is to test your problem-solving ability. Now that the problem is solved, of course.

Hehe, I reply here, on the one hand, I try my best to help you solve the problem, on the other hand, I like math. Now it seems that we are arguing, and no one is convinced. Hehe, little brother, to be honest, you are a little stingy.