30. 3. 202312 tis. zhlédnutíThe popular keychain flashlight is upgraded! Almost doubled the Lumen — E03R V2.0 incrementally delivers max 500 lumens and 90 meters, while E03R is ma...
1. 5. 2022488 tis. zhlédnutíWe will solve 4 impossible-looking equations, sqrt(x)+sqrt(-x)=2, ln(x)+ln(-x)=0, e^x+e^(-x)=0, and sin(x)+sin(-x)=2. From verifying the domains of the funct...