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![Page 1: Additional Mathematics (Add Maths) Harwood Clarke's Textbook (Exercise 18 Solutions)](https://reader033.vdocuments.mx/reader033/viewer/2022052307/552037794a79596f718b4674/html5/thumbnails/1.jpg)
Dr CK Lee’s Additional Mathematics Classes ( 91473612 or check out http://ascklee.org/)
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Solutions to Exercise 18 (p. 43) from Harwood Clarke’s Additional Pure Mathematics
Additional Pure Mathematics is a book used to teach Additional Mathematics in the 1960s
and 1970s. The questions are good, and for selected topics, I require my GCE O-Level
students to attempt questions this book.
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![Page 2: Additional Mathematics (Add Maths) Harwood Clarke's Textbook (Exercise 18 Solutions)](https://reader033.vdocuments.mx/reader033/viewer/2022052307/552037794a79596f718b4674/html5/thumbnails/2.jpg)
Dr CK Lee’s Additional Mathematics Classes ( 91473612 or check out http://ascklee.org/)
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is the 16th term of the G.P.
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![Page 3: Additional Mathematics (Add Maths) Harwood Clarke's Textbook (Exercise 18 Solutions)](https://reader033.vdocuments.mx/reader033/viewer/2022052307/552037794a79596f718b4674/html5/thumbnails/3.jpg)
Dr CK Lee’s Additional Mathematics Classes ( 91473612 or check out http://ascklee.org/)
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√ √
The geometric mean of 18 and 50 is 30.
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Substitute into (2):