keep getting wrong answer
2007-12-10 02:05:24 · 5 answers · asked by ANDREA K 1 in Science & Mathematics ➔ Mathematics
Is this x^(4/5) or (x^4) / 5 ?
Question has to be clarified.
Attempt 1
x^(4/5) = 16
x = 16^(5/4)
x = 2^5
x = 32
Attempt 2
(x^4) / 5 = 16
x^4 = 80
x = 80^(1/4)
x = (5 x 16)^(1/4)
x = 2 ( 5^(1/4) )
2007-12-10 06:43:07 · answer #1 · answered by Como 7 · 4⤊ 0⤋
Take both sides to the 5/4 power:
x^4/5(5/4) = 16^(5/4)
x = 2^5 = 32
That's it!
16^(5/4) is the 4th root of 16 which is 2, then to the 5th power.
:)
2007-12-10 10:09:07 · answer #2 · answered by Marley K 7 · 1⤊ 0⤋
The way this is written, the question should be
(Remember "PMDAS"?)
(x^4) / 5 = 16 (parenthesis added for clarity only)
x^4 = 16 * 5 = 80
(x^4)^(1/4) = (80)^(1/4)
x = 2.99069756
2007-12-10 10:19:43 · answer #3 · answered by dave13 6 · 0⤊ 0⤋
x^4/5=16
x^4 =16^5
x =16^5/4
x =2^5
x =32
2007-12-10 10:14:23 · answer #4 · answered by novia_elwe 2 · 0⤊ 0⤋
x^4/5=16
take log on both sides
log (x)^4/5=log16
4/5logx=log16
logx=5/4log16
log x=5/4*(1.2041)
log x =1.505125
take antilog & u'll get the answer for x
2007-12-10 10:13:55 · answer #5 · answered by Siva 5 · 0⤊ 1⤋