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Simplify: a^7/ a^4
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The key here is to remember the rule for dividing with exponents:
`x^a / x^b = x^(a-b)`
Applying this rule here, we find:
`a^7/a^4 = a^(7-4) = a^3`
Another way of solving this problem is by remembering that a number raised to an exponent is the number multiplied by itself that many times:
`a^7 / a^4 =(a*a*a*a*a*a*a) / (a*a*a*a) = a*a*a = a^3`
Posted by mfonda on July 31, 2012 at 4:41 PM (Answer #1)
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