Question

Let N is set of natural numbers. If R is a relation defined in set N* N such
that (a,b) R (c,d). If ad(b+c)=bc(a+d). Prove that R is an equivalence.​

Answer 1

Answer:

• A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.

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