计算①2/5*√8/3÷√16又2/3 ②-√17÷√85*√1/5
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计算①2/5*√8/3÷√16又2/3 ②-√17÷√85*√1/5
计算①2/5*√8/3÷√16又2/3 ②-√17÷√85*√1/5
计算①2/5*√8/3÷√16又2/3 ②-√17÷√85*√1/5
①2/5*√8/3÷√16又2/3
=2/5×√8/3÷√50/3
=2/5×(√24)/3÷(√150)/3
=2/5×(√24)/3×3/(√150)
=2/5×(√24)/(√150)
=2/5×√(24/150)
=2/5×√(4/25)
=2/5×2/5
=4/25
②-√17÷√85*√1/5
=-√(17×1/85×1/5)
=-√(1/25)
=-1/5
567
①2/5*√8/3÷√16又2/3
=2/5*√(8/3*3/50)
=2/5*√(4/25)
=2/5*2/5
=4/25
②-√17÷√85*√1/5
=-√(17/85/5)
=-√(1/25)
=-1/5