Hi, I am struggling with simplifying the expression for when k_1>>k_2. I tried to take the k_1 out of the square root but I end up with different expressions.
Taking k_1 out of the square root is a good start. As the next step we need to approximate the square root using Taylor series, did you try that?
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You’re missing a square in the second term, and (k_2/k_1)^2 \ll k_2/k_1.
ahh I see, i got it, thank you!