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secondary 3 | A Maths
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I need help in these two qns. Thanks
Date Posted: 8 years ago
Views: 675
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Basically find the minimum point. That is the lowest point of the curve so if that is above y=-3, the whole graph will be above it. Its a minimum point and not a maximum as the coefficient of x^2 is positive.
Left is completing the square right is differentiation.
Left is completing the square right is differentiation.
Date Posted:
8 years ago
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Sorry for blur picture but just have to take two equations substitute together and equate to 0. using discriminant < 0 to find the range
Date Posted:
8 years ago
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For part 2, use discriminant then complete the square and simple explanation about the square is always greater than 0
Date Posted:
8 years ago
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Easier way to complete the square, you can google more on how to do it the quicker way
Date Posted:
8 years ago
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