**Unformatted text preview: **x a a πε Q x a a kQ x a a kQ a x a x a kQ x V α α α a x a x a x If = = ≈ + = + ≈ ⇒ ⋅ ⋅ ⋅ + + ≈ + + ± ≈ ± + << Thus , 2 and , 2 λ a R a Q = ≡ which is the only natural length in the problem....

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