thanks :)
更新1:
thanks everyone - should have added we meant it as /13 or /-13 but have answered the question either way. thanks all :)
169 ^ -1/2 is? 13 or -13?
2011-04-01 9:46 am
after much debate with a friend as to which is the correct answer would like to hear others opinions, and how you came to work it out.
thanks :)
thanks :)
回答 (8)
2011-04-01 11:29 am
✔ 最佳答案
169 ^ -1/2 =(13²)^ -1/2=(13)^{2×( -1/2)}
=(13)‾¹ =1/13
2011-04-01 4:53 pm
1
----------------
169^(1/2)
± 1 / 13
----------------
169^(1/2)
± 1 / 13
2011-04-01 4:48 pm
well when its to a negative power that means it will be moved to the denominator, so it will be
169^(-1/2) = 1/169^(1/2) which is a squareroot so the answer is 1/sqrt(169) which is 1/13
so neither of you is correct.
169^(-1/2) = 1/169^(1/2) which is a squareroot so the answer is 1/sqrt(169) which is 1/13
so neither of you is correct.
2011-04-01 7:31 pm
169^(-1/2)
= (1/169)^(1/2)
= â(1/169)
= 1/13
= (1/169)^(1/2)
= â(1/169)
= 1/13
2011-04-01 5:34 pm
It is 1/13 is only correct answer as square root of any number is always a positive number.
2011-04-01 5:05 pm
169^-1/2 =1/169^1/2=1/13
2011-04-01 4:54 pm
it is 1/13 re
2011-04-01 4:51 pm
Sadly, both answers are incorrect!!!
169^ (-1/2) = 1 / (169^(1/2) = 1 / ± â(169) = ± (1 / 13)
Don't forget that raising to a NEGATIVE power means ' one over the positive power'
169^ (-1/2) = 1 / (169^(1/2) = 1 / ± â(169) = ± (1 / 13)
Don't forget that raising to a NEGATIVE power means ' one over the positive power'
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