Waste less time on Facebook — follow Brilliant.
×

Euler's Identity - What's the falacy?

We know that \(e^{i\pi} = -1 \). So, \(\ln(-1) = i\pi \). Well, \(\ln(1) = 0\). So, I guess we can write \[\ln(-1) + \ln(-1) = \ln(-1\cdot -1) = \ln(1) = 0\]. But \[\ln(-1) + \ln(-1) = i\pi + i\pi = 2i\pi \]

What's the falacy?

Note by Gabriel Laurentino
3 years, 2 months ago

No vote yet
1 vote

Comments

Sort by:

Top Newest

the identity you used is applicable for numbers belonging to the set (0,infinity) only Vivek Kushal · 3 years, 2 months ago

Log in to reply

May be because the properties of ln is applicable only for numbers within its domain.. Kushagra Jaiswal · 3 years, 2 months ago

Log in to reply

@Kushagra Jaiswal I thought the same. Thanks! Gabriel Laurentino · 3 years, 2 months ago

Log in to reply

×

Problem Loading...

Note Loading...

Set Loading...