What came before the Big Bang?

Answer 1

The ingredients.

Even in the case that the Big Bang created our universe, the origin of matter and energy before this event must still be determined.

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Answer 2

Olivia Aldridge

Within the framework of contemporary cosmological theories, the notion of "before" the Big Bang is not clearly defined. The Big Bang theory explains the universe's expansion from a hot, dense state, but it does not explain what preceded or started this state. Other theories put forth concepts like quantum fluctuations, multiverse scenarios, or cyclic universe models, but these are still theoretical and lack empirical backing.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.