Philip

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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...

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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...