Question: a2.dvi (a) Give a proof by cases to show that the equation 5 x^ 2 +4 y^ 3 =51 does not have solutions x, y

a2.dvi

(a) Give a proof by cases to show that the equation 5x^2 +4y^3 =51

does not have solutions x, y Z+ . (b) FornZ+ prove by contraposition that if 2n^3+3n^2+4n+5 is odd thennis even.

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