化簡下列題目並用指數記數法表示答案

2010-01-21 4:04 am
化簡下列題目並用指數記數法表示答案

1.
(a^3)^5
_______
a^-6


2.
(x^3y)^2
_______
y^5


3. 解方程a^x+1=8


4.
(ab^2)^2
________
a5


5.
m^3
___
(mn)^2


6.
(a^-3)
_____
a

回答 (2)

2010-01-21 4:19 am
✔ 最佳答案
化簡下列題目並用指數記數法表示答案
1.[(a^3)^5]/(a^-6)
=a^[3*5-(-6)]
=a^(15+6)
=a^21
2.[(x^3y)^2]/(y^5)
=x^(3*2) y^(2-5)
=x^6 y^-3
=x^6/y^3
3. 解方程a^x+1=8
a^x+1=8
a^x=7
x=log7/loga
4.[(ab^2)^2]/(5a)
=1/5 * a^(2-1) b^(2*2)
=(ab^4)/5
5.(m^3)/[(mn)^2]
=(m^3)/(m^2 n^2)
=m/n^2
6(a^-3)/a
=a^(-3-1)
=a^-4


2010-01-20 20:21:08 補充:
2.) x^6 y^-3
5.) m n^-2
參考: Hope can help you~~
2010-01-21 4:21 am
1.
(a^3)^5
_______

a^-6

=

a^15
____

-a^6

2.
(x^3y)^2
_______

y^5

=


x^6y2
_____

y^10
3. 解方程a^x+1=8

a^x=8-1
a^x=7
x=7/a
x= _7_
a
4.
(ab^2)^2

________

a5

= 2a^2b^2
__________

a^10


5.
m^3
___

(mn)^2

= m^3
________

m^2n^


6.
(a^-3)
_____

a

= -a3
_________

a


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