Solve the equation e^x-4+4e^-x=0?

[匿名]

2015-10-07 1:08 pm

回答 (2)

Bryce

2015-10-07 1:21 pm

e^x(e^x-4+4e^-x)=e^(2x) -4e^x+4=0
e^x=4/2 +/- √[16 -4(4)] /2=2
x=ln2

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Quentin

2015-10-07 1:12 pm

x = log𝚎 2

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