2. What is the sum of all positive integers n that satisfy the inequality 7 n 20 ? 18 5 7 (A) 25 (B) 56 (C) 78 (D) 104 (E) 105 O A O B O c O E Clear selection

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A: We need to prove that 6 divides n3-n for all integers n≥0.

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Q: 7 2 3k+1= [A] k = 2

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Q: 13 (a) Given a set of animals, A = {dog, cat, rat, mouse}, write down the largest subset, P, of the…

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Q: (0. }). (c) C = {p : p is prime). (d) D = (-0, –1). (a) A = (b) B = {-1,1}.

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Q: Let n be an integer. Prove that if 7 divides (n – 2) or 7 divides (n – 5), then 7 divides (n² + 3).

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Q: 7 The coefficient of x³ in the expansion of | x+ 210 21 42 105

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Q: *17) WHICH FIGURE IS LEAST LIKE THE OTHER FOUR? Select the letter of the figure that is most…

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Q: (8)Explain why: (a) Every rational number is an algebraic number (b) Z is not an open set (c) The…

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