1.求定义域:y=√(81-x^2) +log2 (2sinx-√2)
问题描述:
1.求定义域:y=√(81-x^2) +log2 (2sinx-√2)
答
81-x^2≥0 -9≤x≤9
2sinx-√2>0 2kπ+π/4