Random Sec 4 student's answer to Nacy smith's Secondary 3 A Maths Singapore question.
for (ii), need to exclude k=0 because will end up with (0)x^2+(0)x+2 = 0, which simplifies to 2 = 0, which is meaningless.
need to always check if the values of k still gives proper quadratic curve. for k values which results in straight line, then must also exclude.
need to always check if the values of k still gives proper quadratic curve. for k values which results in straight line, then must also exclude.
thanks alot I will remember to check next time!
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