Philip

1. Общност
2. News and Updates from Khan Academy
3. Update: Streaks are going away on January 4, 2021

I'm kind of sad that the streaks function is going away; it had been one of the learning incentives for me (and I am sure for most to all of the others who did use the streaks function and kept lon...

1. Общност
2. Study Group
3. Logarithms with Negative Arguments

Although logarithms are usually undefined for arguments of 0 and negative values, it seems that your calculator and rearrangement is not completely wrong and undefined (though without imaginary and...