这道题怎么做,急急急急急…………

2025-01-05 00:49:17
推荐回答(2个)
回答1:

下来就是(1.25+1.5)/2=1.375
1.375^2<1.89<2
1.375<√2<1.5
(1.375+1.5)/2=1.435 1.435^2=2.066-2>2
1.375<√2<1.44
(1.375+1.44)/2=1.407 1.407^2=1.98<2
1.407<√2<1.44
(1.407+1.44)/2=1.423 1.42^2=2.016-2>2
1.407<√2<1.42
(1.407+1.42)/2=1.413 1.413^2=1.997<2
1.413<√2<1.42
(1.413+1.42)/2=1.416 1.416^2=2.005-2>2
1.413<√2<1.416
所以√2的十分位和百分位分别是4、1

回答2:

取(1.25+1.5)/2=1.375,由1.375平方<1.9<2,得1.375<根号2<1.5
取(1.375+1.5)/2=1.4375,由1.4375平方>2.07>2,得1.375<根号2<1.4375
取(1.375+1.4375)/2=1.40625,由1.40625平方<1.98<2,得1.40625<根号2<1.4375
取(1.40625+1.4375)/2=1.40625,由1.40625平方<1.98<2,得1.40625<根号2<1.4375
取(1.40625+1.4375)/2=1.421875,由1.421875平方>2.02>2,得1.40625<根号2<1.421875
取(1.40625+1.421875)/2=1.4140625,由1.4140625平方>2.02>2,得1.40625<根号2<1.4140625
取(1.40625+1.4140625)/2=1.41015625,由1.41015625平方<1.99<2,得1.41015625<根号2<1.4140625
取(1.41015625+1.4140625)/2=1.412109375,由1.412109375平方<1.995<2,得1.412109375<根号2<1.4140625
所以,根号2十分位上和百分位上的数字是1和4。