Help!!! Stupid question but is 7 to the power of 4 divided by 7= 1 to the power of 3 or 7 to the power of 3????
回答 (6)
2016-06-09 6:03 pm
Why would it be 1^3 = 1 ?
The only way a division = 1 is if numerator = denominator.
Is 7^4 really the same as 7?
(7^4)/7 = (7^4)/(7^1) = 7^(4−1) = 7^3
Remember:
x^a * x^b = x^(a+b)
x^a / x^b = x^(a−b)
(x^a)^b = x^(a*b)
(xy)^a = x^a * y^a
(x/y)^a = x^a / y^a
2016-06-09 6:22 pm
7^4 / 7 =
7^4 / 7^1 =
7^(4 - 1) =
7^3
7^4 / 7^1 =
7^(4 - 1) =
7^3
2016-06-09 6:09 pm
7^3
2016-06-09 6:07 pm
7^4
------ = 7^3
7
------ = 7^3
7
2016-06-09 6:02 pm
7*7*7*7=2407 divided by 7=343
2016-06-09 6:02 pm
7 to the power of 3 :)
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