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What is 2012 Math Exam Solutions and Analysis about?

The document contains information about: (1) A progression with first term a and common difference d where the sum of the first 21 terms is 9 times the sum of the first 5 terms. It is shown that 5d - a = 0. (2) A piece of wire bent to form semicircles where the radius increases by 3 cm each time. It is found that the length of wire forms an AP and the length needed for the first 6 semicircles. (3) Other math problems involving simultaneous equations, quadratic functions, trigonometric functions and probabi

Author

kysim

Language

EN