exam Maths Puzzle Numerical Ability

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2. Form each of the following:
� A linear equation in one variable
� A linear equation in two variables
� A quadratic equation
� A polynomial of three te

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(5x+4)^1/2-3x=o the resistance of an electric wire is directly proportional to the length of the wire and inversely proportional to the square of the diameter. Write a formula expressing this property using R for resistance, L for length, and D for diameter.