please show equation
2007-05-21
15:47:53
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7 answers
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asked by
PaeKm
3
in
Science & Mathematics
➔ Mathematics
2^x = x^2
i try to plot graph that found three answers.
2 , 4 , and another one -1
x = 2 or 4 by inspection
oooh - what a pain ... there is another root
y = 2^x - x^2
You might have to use Newton's method to get that third root
It's somewhere near x = -0.77
2007-05-21 15:51:57 · answer #1 · answered by Orinoco 7 · 0⤊ 0⤋
2 and 4 are solutions. There should also be a solution somewhere around -.5 but i'm only going by what's in my head.
2007-05-21 15:51:41 · answer #2 · answered by cobblestonehero 3 · 0⤊ 0⤋
Graphing this is as good as anything else. You probably DO have 3 answers. Transcentential equations are bitchy.
2007-05-21 15:59:41 · answer #3 · answered by cattbarf 7 · 0⤊ 0⤋
If you plot the difference ( I used my TI-83), you'll see a really interesting curve. It does show three solutions
The tricky one is at x= -0.767; (y= 0.588)
2007-05-21 16:08:22 · answer #4 · answered by modulo_function 7 · 0⤊ 0⤋
log 2^x=log x^2,,,,,,x log 2=2 log x,,,,,,,,,,x/log x=2/log2,,,,,,,,,i dont remember very well the rest but those are the answers.
x= - 0.766665, 4, 2.
2007-05-21 16:03:03 · answer #5 · answered by mathlover 2 · 0⤊ 0⤋
x=2
x=0.766665
x=4
2007-05-21 15:57:27 · answer #6 · answered by K M 2 · 0⤊ 1⤋
there is no answere
2007-05-21 15:51:22 · answer #7 · answered by Anonymous · 0⤊ 1⤋