Final answer:
Macbeth means that his royal position will not be passed on to his children.
Step-by-step explanation:
In The Tragedy of Macbeth, Act III, scene i, when Macbeth says, "Upon my head they placed fruitless crown/And put a barren scepter in my gripe,/Thence to be wrenched with an unlineal hand,/No son of mine succeeding," he means that his royal position will not be passed on to his children.
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