Question

02. Let π‘ˆ = {βˆ’1;1/2; two; 4;1/3; 5}. Check whether or not the following pairs A and B of sets are equal: a) 𝐴 = {π‘₯ ∈ π‘ˆ/π‘₯ + 1 = 3} and 𝐡 = {π‘₯ ∈ π‘ˆ/2π‘₯ βˆ’ 3 = 1} b) 𝐴 = {π‘₯ ∈ π‘ˆ/π‘₯ < 0} and 𝐡 = {π‘₯ ∈ π‘ˆ/π‘₯ + 1 = 0} c) 𝐴 = {π‘₯ ∈ π‘ˆ/0 < π‘₯ < 5} and 𝐡 = {π‘₯ ∈ π‘ˆ/0 ≀ π‘₯ ≀ 5 } d) 𝐴 = {π‘₯ ∈ π‘ˆ/π‘₯ 2 βˆ’ 5π‘₯ + 6 = 0} and 𝐡 = {π‘₯ ∈ π‘ˆ/π‘₯ < 5}

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Answer to a math question 02. Let π‘ˆ = {βˆ’1;1/2; two; 4;1/3; 5}. Check whether or not the following pairs A and B of sets are equal: a) 𝐴 = {π‘₯ ∈ π‘ˆ/π‘₯ + 1 = 3} and 𝐡 = {π‘₯ ∈ π‘ˆ/2π‘₯ βˆ’ 3 = 1} b) 𝐴 = {π‘₯ ∈ π‘ˆ/π‘₯ < 0} and 𝐡 = {π‘₯ ∈ π‘ˆ/π‘₯ + 1 = 0} c) 𝐴 = {π‘₯ ∈ π‘ˆ/0 < π‘₯ < 5} and 𝐡 = {π‘₯ ∈ π‘ˆ/0 ≀ π‘₯ ≀ 5 } d) 𝐴 = {π‘₯ ∈ π‘ˆ/π‘₯ 2 βˆ’ 5π‘₯ + 6 = 0} and 𝐡 = {π‘₯ ∈ π‘ˆ/π‘₯ < 5}

Expert avatar
Neal
4.5
105 Answers
a) UMA={π‘₯ ∈ π‘ˆ/π‘₯ + 1 = 3} Do conjunto U, apenas 2+1=3 entΓ£o A={2} B = {π‘₯ ∈ π‘ˆ/2π‘₯ βˆ’ 3 = 1} 2x-3=1\implica 2x=4\implica x=2 EntΓ£o B={2} Portanto A = B b) A={-1}, resolver para B tambΓ©m dΓ‘ {-1}, portanto eles sΓ£o iguais. c) A={1/2, 2, 4, 1/3} mas B={1/2, 2, 4, 1/3, 5} entΓ£o eles nΓ£o sΓ£o iguais porque 5 nΓ£o estΓ‘ no conjunto A. d) Resolver a equaΓ§Γ£o quadrΓ‘tica dΓ‘ x=2,3 entΓ£o A={2,3} B = {-1, 1/2, 2, 4, 1/3} entΓ£o os conjuntos nΓ£o sΓ£o iguais.

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