does anyone know how to solve this?
x: 3[to the 4th power x + 2nd power] =243
its like foiling or something.
2007-01-18 12:49:55 · 3 answers · asked by x3couture_glam 2 in Science & Mathematics ➔ Mathematics
all i know is that the answer is 3/4. but i dont dont know how do get that answer.
2007-01-18 12:55:58 · update #1
yes, 3^(4x).
2007-01-18 13:02:46 · update #2
how did you get the 5??
2007-01-18 13:07:01 · update #3
omg. thank you so much.
2007-01-18 13:12:08 · update #4
3 ^ ( 4x + 2) = 243
log 243 to base 3 = 4x + 2
log 243 / log 3 = 4x + 2
5 = 4x + 2
3 = 4x
x = 3 / 4
The hardest part was working out what you meant!
2007-01-18 13:03:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
I guessing you mean 3^(4x+2)=243
let's make it easy to start with by making a sub
let y=4x+2
Now solve 3^y=243
243 = 3 * 3 * 3 * 3 * 3 or 3^5
so y = 5
y=5=4x+2
solve for x
3 = 4x
x = 3/4
Now you could use log's to solve also But that's a little more complex
2007-01-18 21:07:44 · answer #2 · answered by lostlatinlover 3 · 1⤊ 0⤋
Your question is a bit unclear.
What do you mean by 3 to the 4th power x?
Do you mean 3^(4x)?
2007-01-18 21:01:47 · answer #3 · answered by Puggy 7 · 0⤊ 0⤋