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Angelina_Jolie [31]
3 years ago
11

Let A and B be sets with cardinal numbers , n(A) = a and n(B) = b respectively . Decide whether the statement is true or false.

2) n(A cup B)=n(A)+n(B)-n(A cap B)
Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
4 0

Answer:

True

Step-by-step explanation:

A\cup B=A\cup(A-B)\\\\A\ and\ A-B\ are\ disjoint\ that\ means\ there\ is\ no\ common\ element\ in\ these\ two.\\\\n(A\cup B)=n(B\cup(A-B))\\\\n(A\cup B)=n(B)+n(A-B)\ \ \ \ \ \ \ as\ for\ disjoint\ set\ P,Q\ n(P\cup Q)=n(P)+n(Q)\\\\(n(P-Q)=n(P)-n(P\cap Q))\\\\n(AUB)=n(B)+n(A-B)\\\\n(AUB)=n(B)+n(A)-n(A\cap B)\\\\n(AUB)=n(A)+n(B)-n(A\cap B)\\\\Hence\ given\ statement\ is\ true

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Answer:

x>5

Step-by-step explanation:

2x - 7 > 3

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The radius of a sphere is increasing at a rate of 5 mm/s. How fast is the volume increasing (in mm3/s) when the diameter is 40 m
jeka94

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Answer:

  8000π mm^3/s ≈ 25,133 mm^3/s

Step-by-step explanation:

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Ilia_Sergeevich [38]

Total number of cubic inches of cheese sauce in container = Volume of cylinder = \pi .8^2.7

Option A is correct.

Step-by-step explanation:

The diameter of cylinder = 16 inches

The height of cylinder = 7 inches

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The formula used to find Volume of cylinder is:

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Option A is correct.

Keywords: Volume of cylinder

Learn more about Volume of cylinder at:

  • brainly.com/question/12497249
  • brainly.com/question/6443737

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