i simply cannot seem to solve this problem. It's a take home test and every answer i come up with isn't an option. the possible answers given are:
A) 0, 1
B) 1, 4
C) 1, 38.672
D) 1, 6.219
2007-10-10 14:53:36 · 6 answers · asked by yellowx_xeyes 1 in Science & Mathematics ➔ Mathematics
log x^4 = (log x)^4
log x^4 = 4*log x
Let y = log x
y^4 = 4y
y^3 = 4
y = cuberoot 4 = 1.587
log x = y = 1.587
x = 38.672
You get 1 as an answer because log(1) = 0
Answer C: 1, 38.672
2007-10-10 15:05:57 · answer #1 · answered by Steve A 7 · 0⤊ 0⤋
Trial and error shows the answer is C. A is obviously out because log(0) is undefined. B and D are out because the log of the second number is below 1. When you take the 4th power, they will simply get smaller. But the LHS is clearly going to be greater than one, after you take the 4th power and THEN the log.
2007-10-10 22:04:12 · answer #2 · answered by btherl 2 · 0⤊ 0⤋
i cant seem to find an answer either... im really good at logs, but there doesnt seem to be an answer for this. i hope im understanding the problem correctly... you just plug in the choice terms for x, right? thats what i did for each letter choice, but nothing gives me a number = same number for there to be a right answer. maybe your teacher made a mistake? i dunno. sorry :(
-rosie
2007-10-10 22:02:41 · answer #3 · answered by Rosie 3 · 0⤊ 0⤋
did you try graphing both and looking for the intersect
2007-10-10 21:56:56 · answer #4 · answered by Anonymous · 0⤊ 0⤋
my head hurts srry. =[
2007-10-10 21:56:52 · answer #5 · answered by SoSexii14 2 · 0⤊ 0⤋
huh?
2007-10-10 21:55:53 · answer #6 · answered by Anonymous · 0⤊ 0⤋