Chinese | A Nice Algebra Problem | Math Olympiad

[@LITHICKROSHANMS-gw2lx]

Very thanks sir

[@SALogics]

Most welcome! ❤

[@YAWTon]

f(x)=4^x-x is a convex function, f(-1)=-0.75, f(1)=4 ==> there is exactly one real solution. This solution is obviously x=-1/2, since 4^(-1/2)=1/√4=1/2.

[@SALogics]

You are right! ❤

[@yuryp6975]

More importantly, increasing function

[@haticekoca5716]

4^×+×=0 ×^×-4=0 2^2-4=0 -1/2

[@SALogics]

Very nice! ❤

[@ludovicosanchez7839]

Mi like 69😅