Andrea Yeo's answer to Twinkelbekl's Secondary 4 A Maths Singapore question.
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1. Find y in terms of x. Area of PQRS = 2x * y.
2. Find max x value by differentiation of A over x. Sub value of x into area formula to get max. area.
2. Find max x value by differentiation of A over x. Sub value of x into area formula to get max. area.
Date Posted:
4 years ago
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