#証明
November 7, 2023: Studying Maths (26), Proofs （数学の勉強（26）、証明）
I began to study maths with a new book and it was about proofs that I first I studied with. As I expected, it was so hard that I needed a lot of time to understand it. It explained proofs in such a si
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June ２, 2023: Studying Maths (11), Algebra (6)（数学の勉強(11)、代数(6）)
I had been doing sequences, proofs, and direct and inverse proportions for the last ten days. As expected, they were not easy to understand, and I needed more time to master them than before. Neverthe
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