计算: (1)-8
(2)2
|
(1)原式=-8×1.732+
×1.4142 3
≈-13.856+2.828 3
≈-13.868+0.942
≈-12.9;
(2)原式=2×1.732+
-10×2.246 2 1 5
≈3.464+1.123-2
≈2.58.
计算: (1)-8
(2)2
|
(1)原式=-8×1.732+
×1.4142 3
≈-13.856+2.828 3
≈-13.868+0.942
≈-12.9;
(2)原式=2×1.732+
-10×2.246 2 1 5
≈3.464+1.123-2
≈2.58.