根号下(0.09x169)/(0.64x196)怎么算
问题描述:
根号下(0.09x169)/(0.64x196)怎么算
答
√[﹙0.09×169﹚/﹙0.64×196﹚]
=√[﹙0.3²×13²﹚/﹙0.8²×14²﹚]
= 0.3×13/0.8×14
=39/112.