質問: ðñññ ð»ð ̧ ñ ð2ð°ñ ðoð°ðoð ̧ðμ-ð»ð ̧ð±ð3⁄4 ð¿ð3⁄4ð ́ñðoð°ð·ðoð ̧** ñð3⁄4ð3ð3⁄4, ðoð°ðo ð·ð°ñð°ññ ñðμð±ðμð1⁄2ðoð° ð ̧ ð3⁄4ð±ñðμññð ̧ ð·ð ́ð3⁄4ñð3⁄4ð2ññ ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ñññ.
回答: ðð3⁄4ð ́ñðoð°ð·ðoð ̧ ð1⁄2ð ̧ð¶ðμ ð¿ð3⁄4ð1⁄4ð3⁄4ð3ññ ð2ð°ð1⁄4 ð ́ð°ññ ð2ð°ñðμð1⁄4ñ ñðμð±ðμð1⁄2ðoñ ñ ð3⁄4ñð3⁄4ñð ̧ð1 ññð°ññ ð2 ð¶ð ̧ð·ð1⁄2ð ̧. ðñð ̧ð1⁄2ð ̧ð1⁄4ð°ð1ñðμ ñð3⁄4ð»ð ̧ðμð2ññ ðoð ̧ñð»ð3⁄4ññ. ðñð ̧ðμð1⁄4 ñð3⁄4ð»ð ̧ðμð2ð3⁄4ð1 ðoð ̧ñð»ð3⁄4ññ ð ́ð3⁄4 ð1⁄2ð°ñð°ð»ð° ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ññð ̧ ññðμð·ð2ññð°ð1ð1⁄2ð3⁄4 ð2ð°ð¶ðμð1⁄2, ð¿ð3⁄4ñðoð3⁄4ð»ñðoñ ññð3⁄4 ð3⁄4ð±ðμñð¿ðμñð ̧ñ ð ́ð3⁄4ññð°ñð3⁄4ñð1⁄2ð3⁄4ðμ ðoð3⁄4ð»ð ̧ñðμññð2ð3⁄4 ññð3⁄4ð3ð3⁄4 ð2ð°ð¶ð1⁄2ð3⁄4ð3ð3⁄4 ð2ð ̧ñð°ð1⁄4ð ̧ð1⁄2ð° ð2 ð2ð°ñðμð1⁄4 ñðμð»ðμ ð1⁄2ð° ñð°ð1⁄4ññ ñð°ð1⁄2ð1⁄2ð ̧ñ ññð3⁄4ðoð°ñ ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ññð ̧. ðñð ̧ðμð1⁄4 ñð3⁄4ð»ð ̧ðμð2ð3⁄4ð1 ðoð ̧ñð»ð3⁄4ññ ð1⁄4ð3⁄4ð¶ðμñ ð¿ñðμð ́ð3⁄4ñð2ñð°ñð ̧ññ ð3⁄4ð±ñð°ð·ð3⁄4ð2ð°ð1⁄2ð ̧ðμ ð ́ðμñðμðoñð3⁄4ð2 ñññð±ðoð ̧ (ð¿ñð3⁄4ð±ð»ðμð1⁄4ñ ñ ñð3⁄4ñð1⁄4ð ̧ñð3⁄4ð2ð°ð1⁄2ð ̧ðμð1⁄4 ñð¿ð ̧ð1⁄2ð1⁄2ð3⁄4ð3ð3⁄4 ð1⁄4ð3⁄4ð·ð3ð°, ð1⁄2ð°ð¿ñð ̧ð1⁄4ðμñ ñð¿ð ̧ð1⁄2ð°ð»ñð1⁄2ñð1 ð ́ð ̧ð·ñð°ñð ̧ð·ð1⁄4). ðñð3⁄4ð2ðμð ́ð ̧ñðμ ñð ̧ð·ð ̧ñðμñðoð ̧ð1 ð3⁄4ñð1⁄4ð3⁄4ññ. ððμñðμñð1⁄4ð3⁄4ññð ̧ñðμ ñð2ð3⁄4ð1 ññð ̧ð»ñ ð¶ð ̧ð·ð1⁄2ð ̧, ð1⁄2ð°ð¿ñð ̧ð1⁄4ðμñ ññð3⁄4ð2ðμð1⁄2ñ ð¿ð3⁄4ññðμð±ð»ðμð1⁄2ð ̧ñ ð°ð»ðoð3⁄4ð3ð3⁄4ð»ñ ð ̧ ñð ̧ð3ð°ñðμñ, ð¿ñð ̧ðμð1⁄4 ð¿ñðμð¿ð°ñð°ñð3⁄4ð2 ð ̧ ð2ð°ðoñð ̧ð1⁄2ð°ñð ̧ñ. ðñð3⁄4ð1⁄4ðμ ñð3⁄4ð3ð3⁄4, ð¿ð3⁄4ð¿ñð3⁄4ñð ̧ñðμ ñð2ð3⁄4ðμð3ð3⁄4 ñðμñð°ð¿ðμð2ñð° ð ́ð°ññ ð3⁄4ð±ñð ̧ðμ ñðμðoð3⁄4ð1⁄4ðμð1⁄2ð ́ð°ñð ̧ð ̧ ð3⁄4 ð·ð°ñð°ñð ̧ð ̧ ð ̧ ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ññð ̧. ðð±ñðμñð ̧ñðμ ð·ð ́ð3⁄4ñð3⁄4ð2ñð1 ð2ðμñ. ð§ñðμð·ð1⁄4ðμñð1⁄2ñð1 ð ̧ ð1⁄2ðμð ́ð3⁄4ññð°ñð3⁄4ñð1⁄2ñð1 ð2ðμñ ð1⁄4ð3⁄4ð3ññ ñð¿ð3⁄4ñð3⁄4ð±ññð2ð3⁄4ð2ð°ññ ð3⁄4ñð»ð3⁄4ð¶ð1⁄2ðμð1⁄2ð ̧ñð1⁄4 ð2 ð·ð°ñð°ñð ̧ð ̧. ðñð3⁄4ðoð3⁄4ð1⁄2ññð»ññð ̧ññð1ñðμññ ñ ð2ñð°ñð3⁄4ð1⁄4 ð3⁄4ð± ð ̧ð ́ðμð°ð»ñð1⁄2ð3⁄4ð1⁄4 ð ́ð»ñ ð2ð°ñ ð2ðμñðμ ð ̧ ð3⁄4 ñð3⁄4ð1⁄4, ðoð°ðo ðμð3ð3⁄4 ð ́ð3⁄4ññð ̧ññ ð ̧ ð¿ð3⁄4ð ́ð ́ðμñð¶ð ̧ð2ð°ññ. ðð°ð1⁄2ð ̧ð1⁄4ð°ð1ñðμññ ñð¿ð3⁄4ññð3⁄4ð1⁄4. ðñð3⁄4 ð¿ð3⁄4ð1⁄4ð3⁄4ð¶ðμñ ñðoñðμð¿ð ̧ññ ð2ð°ñð ̧ ð1⁄4ññññ ð ̧ ð¿ð3⁄4ð ́ð ́ðμñð¶ð ̧ð2ð°ññ ð ̧ñ ñð3⁄4ð1⁄2ññ, ð° ñð°ðoð¶ðμ ð3⁄4ð±ð»ðμð3ñð ̧ñ ð2ñð1⁄2ð°ñð ̧ð2ð°ð1⁄2ð ̧ðμ ñðμð±ðμð1⁄2ðoð°. ðð3⁄4ñð»ðμ ð·ð°ñð°ñð ̧ñ ñðμðoð3⁄4ð1⁄4ðμð1⁄2ð ́ñðμñññ ð2ñð¿ð3⁄4ð»ð1⁄2ñññ ñð ̧ð·ð ̧ñðμñðoð ̧ðμ ñð¿ñð°ð¶ð1⁄2ðμð1⁄2ð ̧ñ ð ́ð3⁄4ñð3⁄4ð ́ð3⁄4ð2ð3⁄4ð3ð3⁄4 ð¿ðμñð ̧ð3⁄4ð ́ð°, ðoð3⁄4ñð3⁄4ññðμ ð¿ð3⁄4ð1⁄4ð3⁄4ð3ññ ð2ð°ð1⁄4 ð3⁄4ññð°ð2ð°ññññ ð·ð ́ð3⁄4ñð3⁄4ð2ñð1⁄4ð ̧, ð¿ð3⁄4ñðoð3⁄4ð»ñðoñ ñð°ð·ñð°ð±ð3⁄4ñð°ð1⁄2ñ ñð¿ðμñð ̧ð°ð»ñð1⁄2ð3⁄4 ð ́ð»ñ ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ññ ð¶ðμð1⁄2ñð ̧ð1⁄2. ðð±ð3⁄4ð3ð°ñð ̧ñðμ ð¿ð ̧ñð°ð1⁄2ð ̧ðμ. ðñ ñð2ð»ñðμñðμññ ðμð ́ð ̧ð1⁄2ññð2ðμð1⁄2ð1⁄2ñð1⁄4 ð ̧ññð3⁄4ñð1⁄2ð ̧ðoð3⁄4ð1⁄4 ð¿ð ̧ñð°ð1⁄2ð ̧ñ ð ́ð»ñ ñðμð±ðμð1⁄2ðoð°. ðð3⁄4ññð3⁄4ð1⁄4ñ ñð±ðμð ́ð ̧ñðμññ ð2 ð¿ð3⁄4ð»ññðμð1⁄2ð ̧ð ̧ ð ́ð3⁄4ññð°ñð3⁄4ñð1⁄2ð3⁄4ð3ð3⁄4 ðoð3⁄4ð»ð ̧ñðμññð2ð° ðoð°ð»ññð ̧ñ, ð¿ñð3⁄4ñðμð ̧ð1⁄2ð3⁄4ð2, ð2ð ̧ñð°ð1⁄4ð ̧ð1⁄2ð3⁄4ð2 ð ̧ ñð3ð»ðμð2ð3⁄4ð ́ð3⁄4ð2 ð1⁄2ð° ð¿ñð3⁄4ññð¶ðμð1⁄2ð ̧ð ̧ ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ññð ̧. ðð·ð±ðμð3ð°ð1ñðμ ñð¿ð3⁄4ññðμð±ð»ðμð1⁄2ð ̧ñ ð1⁄2ð°ð¿ð ̧ñðoð3⁄4ð2 ñ ðoð3⁄4ñðμð ̧ð1⁄2ð3⁄4ð1⁄4 ð ̧ ð1⁄2ðμð¿ð°ññðμñð ̧ð·ð3⁄4ð2ð°ð1⁄2ð1⁄2ññ ð1⁄4ð3⁄4ð»ð3⁄4ñð1⁄2ññ ð¿ñð3⁄4ð ́ñðoñð3⁄4ð2. ðñð ́ññðμ ð2ð1⁄2ð ̧ð1⁄4ð°ñðμð»ñð1⁄2ñ ðo ð»ðμðoð°ñññð2ðμð1⁄2ð1⁄2ñð1⁄4 ð¿ñðμð¿ð°ñð°ñð°ð1⁄4. ðð±ññð ́ð ̧ñðμ ñ ð2ñð°ñð3⁄4ð1⁄4 ð2ñðμ ñð°ð·ñðμñðμð1⁄2ð1⁄2ñðμ ð ́ð»ñ ð2ð°ñ ð1⁄4ðμð ́ð ̧ñð ̧ð1⁄2ñðoð ̧ðμ ð¿ñðμð¿ð°ñð°ññ, ð3⁄4ñð¿ññðoð°ðμð1⁄4ñðμ ð¿ð3⁄4 ñðμñðμð¿ññ ð ̧ ð±ðμð· ñðμñðμð¿ñð°. ðð·ð±ðμð3ð°ð1ñðμ ð ̧ð1⁄2ñðμðoñð ̧ð1 (ð1⁄2ð°ð¿ñð ̧ð1⁄4ðμñ, ñð3⁄4ðoñð3⁄4ð¿ð»ð°ð·ð1⁄4ð3⁄4ð·ð°). ðñðμð3ð ́ð° ð1⁄4ð3⁄4ð1ñðμ ñññðoññ ð ̧ ð3⁄4ð2ð3⁄4ñð ̧, ð ̧ñð¿ð3⁄4ð»ñð·ñð1ñðμ ð¿ðμññð°ñðoð ̧ ð2ð3⁄4 ð2ñðμð1⁄4ñ ñð°ð±ð3⁄4ññ ð2 ñð°ð ́ñ ð ̧ ñð ̧ññðoð ̧ ðoð3⁄4ñð°ññð ̧ñ ññð°ð»ðμñð3⁄4ð2 ð ̧ ñð¿ð3⁄4ññðμð±ð»ñð1ñðμ ñð3⁄4ð»ñðoð3⁄4 ñ ð3⁄4ñð3⁄4ñð3⁄4 ð3⁄4ð±ñð°ð±ð3⁄4ñð°ð1⁄2ð1⁄2ð3⁄4ðμ ð1⁄4ññð3⁄4. ððμñð¶ð ̧ñðμ ñð2ð3⁄4ðμð3ð3⁄4 ññð3⁄4ð1⁄4ð°ñð3⁄4ð»ð3⁄4ð3ð° ð2 ðoñññðμ. ðñð ̧ ð1⁄2ðμð3⁄4ð±ñ ð3⁄4ð ́ð ̧ð1⁄4ð3⁄4ññð ̧ ð»ðμñðμð1⁄2ð ̧ñ ð·ñð±ð3⁄4ð2 ñð3⁄4ð3⁄4ð±ñð ̧ñðμ ññð3⁄4ð1⁄4ð°ñð3⁄4ð»ð3⁄4ð3ñ ð3⁄4 ñð2ð3⁄4ðμð1 ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ññð ̧. ððμðoð3⁄4ñð3⁄4ññðμ ð1⁄4ðμñð3⁄4ð ́ð ̧ðoð ̧ ð»ðμñðμð1⁄2ð ̧ñ ð1⁄4ð3⁄4ð3ññ ð1⁄2ð°ð2ñðμð ́ð ̧ññ ñðμð±ðμð1⁄2ðoñ. ðñð ̧ð ́ðμñð¶ð ̧ð2ð°ð1ñðμññ ð1⁄4ðμñ ð±ðμð·ð3⁄4ð¿ð°ñð1⁄2ð3⁄4ññð ̧ ð1⁄2ð° ñð°ð±ð3⁄4ñðμ. ððμññ ð±ðμð·ð3⁄4ð¿ð°ñð1⁄2ð3⁄4ññð ̧ ð1⁄2ð° ñð°ð±ð3⁄4ñðμð1⁄4 ð1⁄4ðμññðμ ð ́ð»ñ ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ññ ð¶ðμð1⁄2ñð ̧ð1⁄2 ð3⁄4ñð»ð ̧ñð°ññññ ð2 ð·ð°ð2ð ̧ñð ̧ð1⁄4ð3⁄4ññð ̧ ð3⁄4ñ ñññð°ð1⁄2ñ, ð¿ð3⁄4ññð3⁄4ð1⁄4ñ ð2ð°ð1⁄4 ð1⁄2ðμð3⁄4ð±ñ ð3⁄4ð ́ð ̧ð1⁄4ð3⁄4 ð¿ñð3⁄4ðoð3⁄4ð1⁄2ññð»ññð ̧ñð3⁄4ð2ð°ññññ ñ ð¿ñð3⁄4ñðμññð ̧ð3⁄4ð1⁄2ð°ð»ñð1⁄2ð3⁄4ð1 ð3⁄4ñð3ð°ð1⁄2ð ̧ð·ð°ñð ̧ðμð1, ð3⁄4ñð2ðμñññð2ðμð1⁄2ð1⁄2ð3⁄4ð1 ð·ð° ñðμðoð3⁄4ð1⁄4ðμð1⁄2ð ́ð°ñð ̧ð ̧ ð¿ð3⁄4 ññð3⁄4ð1 ñðμð1⁄4ðμ ð2 ð2ð°ñðμð1 ñññð°ð1⁄2ðμ. **ð ðμðoð3⁄4ð1⁄4ðμð1⁄2ð ́ð°ñð ̧ð ̧ ð¿ñð ̧ð2ðμð ́ðμð1⁄2ñ ñð3⁄4ð»ñðoð3⁄4 ð2 ñðμð»ññ ð ̧ð1⁄2ñð3⁄4ñð1⁄4ð ̧ñð3⁄4ð2ð°ð1⁄2ð ̧ñ. ðñðμð3ð ́ð° ð3⁄4ð±ñð°ñð°ð1ñðμññ ðo ðoð2ð°ð»ð ̧ñð ̧ñð ̧ñð3⁄4ð2ð°ð1⁄2ð1⁄2ð3⁄4ð1⁄4ñ ð2ñð°ññ ð·ð° ðoð3⁄4ð1⁄2ññð»ññð°ñð ̧ðμð1, ð3⁄4ñð3⁄4ð±ðμð1⁄2ð1⁄2ð3⁄4 ð ́ð»ñ ð3⁄4ññð»ðμð¶ð ̧ð2ð°ð1⁄2ð ̧ñ ñ ð3⁄4ð ́ð° ð ̧ ð¿ñð3⁄4ð ́ð3⁄4ð»ð¶ð ̧ñðμð»ñð1⁄2ð3⁄4ññð ̧ ð2ð°ñðμð1 ð±ðμñðμð1⁄4ðμð1⁄2ð1⁄2ð3⁄4ññð ̧. ðñðμð3ð ́ð° ð2ð1⁄2ð ̧ð1⁄4ð°ñðμð»ñð1⁄2ð3⁄4 ñð ̧ñð°ð1ñðμ ð ̧ð1⁄2ññññðoñð ̧ð ̧ ðo ð¿ñð3⁄4ð ́ñðoññ ð ́ð3⁄4 ðμð3ð3⁄4 ð ̧ñð¿ð3⁄4ð»ñð·ð3⁄4ð2ð°ð1⁄2ð ̧ñ.