What's the wrongest thing a teacher ever told you?
What's the wrongest thing a teacher ever told you?
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173 comments
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That x^0.5 is not the same as the square root of x
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Please explain :)
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X^3 = x•x•x
X^2 = x•x
X^1 = x
X^0 = 1
X^-1 = 1/x
X^-2 = 1/(x•x)
X^-3 = 1/(x•x•x)
When the exponent is between -1 and 1, it becomes a root function:
X^(1/2) = sqrt(x)
X^(1/3) = cubic root(x)
X^-(1/2) = 1/(sqrt(x))
X^-(1/3) = 1/(cubic root(x))
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Oh I misunderstood the original comment, the teacher said it wasn't the same, but it is the same. My understanding is that sqrt(x) = x^1/2
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173 comments