F.2數學題目11條[急急急急]平方根

temaymay

2008-08-21 8:44 pm

要有step...

1. 1 ÷ √2
2. 2 ÷ √3
3. 5 ÷ √5
4. 3 ÷ √7
5. √2 ÷√3
6. √2 ÷√10
7. 3√3 ÷ √18
8. √9/5
9. √27/3
10. √5/12
11. If √2 = 1.414, without using a calculator, find the value of 4÷√32

回答 (1)

[匿名]

2008-08-21 9:20 pm

✔ 最佳答案

1. 1 ÷ √2=1*√2 ÷ √2*√2=√2÷ 2
2. 2 ÷ √3=2*2 √3÷ √3*√3=2√3÷3
3. 5 ÷ √5=5*√5 ÷ √5*√5=5*√5÷ √5=5
4. 3 ÷ √7=3√7* ÷ √7*√7=3√7÷7
5. √2 ÷√3=√2 *√3÷√3*√3=√6÷3
6. √2 ÷√10=√2 *√10÷√10*√10=√20÷10=√4X5 ÷10=2√5÷10=
√5 ÷5
7. 3√3 ÷ √18=3√3 ÷ √18=3√3 ÷ √2X9=3√3 ÷ 3√2=√3 ÷√ 2=

=√3*√2÷√2*√2==√6÷2

8. √9/5=√3X3/5=3/5
9. √27/3=√3X3X3/3=3√3/3=√3
10. √5/12 COULD NOT BE SIMPIFY
11. 4÷√32 =4÷√2X2X2X2X2=4÷4√2 =1÷√2 =1/1.414.

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