Win 10 Q6 weapons

Day 1,552, 02:19 Published in Philippines Philippines by Vincenzo Roque

Why is ePhilippines inactive?
To try to raise ePhilippine activity, I will give 10 Q6 weapons to the first eFilipino to correctly answer one of the questions below:

Suppose a and b are two real numbers satisfying (a – 5)^2 + (b – 5)^2 = 18. Find the largest possible value of a/b.

Find all nonempty finite sets X of real numbers with the following property:
(x + |x|) is an element of X for all x element of X.

Find all (if there is one) functions f that satisfy the following functional equation:
f(f(x)) + xf(x) = 1 for all x element of R.

Also, I am running for congress in Palawan, here's my article about it. If I win, I will give away weapons in this way again. So please vote for me.

Don't forget to vote and subscribe.