Where does the decimal point go?
Evan wrote 4500 as 4.5 * 10^4. He counted the digits instead of the decimal jumps.
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1 lesson for “Scientific notation”
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What is f(-2) when f(x) = x^2 - 4x?
f(x) is a rule with a name, not multiplication. f(-2) means: feed -2 into the rule and see what comes out.
Try this lessonWhich x values are allowed in f(x) = 1/(x - 2)?
A function's domain is the list of numbers you may feed it. A zero denominator is one number that is never allowed.
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