In Sakurai (Quantum Mechanics) (See attached).(adsbygoogle = window.adsbygoogle || []).push({});

What is meant by "which is what we expect by substitution of ∇' "? Do they mean that I have to substitute it above and I should get equation (2.6.30)? Because I tried but couldn't simplify further.

Thanks in advance.

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# Didn't understand what Sakurai meant by this.

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