Tính
a/A=$\sqrt[3]{20+14\sqrt{2}}+$ $\sqrt[3]{20-14\sqrt{2}}$
b/B=$\frac{20}{3\sqrt{5}+\sqrt{2+4\sqrt{5}}}$
Tính a/A=$\sqrt[3]{20+14\sqrt{2}}+$ $\sqrt[3]{20-14\sqrt{2}}$ b/B=$\frac{20}{3\sqrt{5}+\sqrt{2+4\sqrt{5}}}$
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Tính
a/A=$\sqrt[3]{20+14\sqrt{2}}+$ $\sqrt[3]{20-14\sqrt{2}}$
b/B=$\frac{20}{3\sqrt{5}+\sqrt{2+4\sqrt{5}}}$
Euphemia
Đáp án:
A= 4
B~ 1,99672
Giải thích các bước giải:
Amity
TL: