A few days ago
Mathematics.?
Simplify this question, giving your answer in positive index only.
Q1) 2a^-5 / 7b^-5
Please give detailed working so that I will understand.
Thank you very much for your help.
Top 2 Answers
A few days ago
Favorite Answer
whenever you see negative power, its 1/something. for example, x^-2435=1/ x^2435.
so
2a^-5=1 / (2a^5)
7b^-5=1/ (7b^5)
so [1 / (2a^5)] / [1/ (7b^5)]
=[1 / (2a^5)] x [(7b^5)/1]
=[1 / (2a^5)] x 7b^5
=7b^5 / 2a^5
see how it works now? if both power are the same negative numbers. just flip them. then change the power to positive. example,
x^-6 / y^-6 = y^6/ x ^6,
(abc)^-34 / (xyz )^-34 = (xyz )^34 / (abc)^34
0
A few days ago
Jack is *almost* right……
2a^-5 = 2 / a^5
and
1 / 7b^-5 = b^5 / 7
Notice the coefficients of 2 and 7 DO NOT move.
So, the correct answer is:
2b^5
——-
7a^5
Good luck in your studies,
~ Mitch ~
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