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there are pre 1990 4u solutions? - where would i find these?

this was an 4u question in 1979, and the last q on the killara '2020 3u trial, which should have solutions.

The Mastering HSC Mathematics 4U Textbook references Fully Worked Solutions in the answers at the back of the book. No such vector solutions exist on their website - nor do most mechanics exercises. Anyone have access?

me too!