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1.Simplify:
(a) (-8a^4b^3)(-9a^3b^2)
2.find the value of the following:
(a) -8^4
(b) (2^6)^5/(2^7)^4
3.p^2xpq/(p^2q^2)=
A. pq
B. p/q
C. 1/pq^2
D. 1/p^2q
f.1 math
2007-07-25 8:17 am
回答 (2)
2007-07-25 8:21 am
✔ 最佳答案
1.Simplify:(a) (-8a^4b^3)(-9a^3b^2)
=72a^7b^5
2.find the value of the following:
(a) -8^4
=-4096
(b) (2^6)^5/(2^7)^4
=4
3.p^2xpq/(p^2q^2)=
A. pq
B. p/q
C. 1/pq^2
D. 1/p^2q
ans: B
參考: own
2007-07-26 9:44 pm
1.Simplify:
(a) (-8a^4b^3)(-9a^3b^2)
=-8a^4*b^3*-9a^3*b^2
=72a^7*b^5
=72a^7b^5
2.find the value of the following:
(a) -8^4
=-8*-8*-8*-8
=64*-8*-8
=-512*-8
=4096
(b) (2^6)^5/(2^7)^4
=2^30/2^28
=2^2/2
=4/2
=2
3.p^2xpq/(p^2q^2)=
A. pq
B. p/q
C. 1/pq^2
D. 1/p^2q
if p=2,q=3
p^2xpq/(p^2q^2)
=2^2x(2x3)/(2^2x3^2)
=4x6/(4x9)
=4x6/36
=24/36
=2/3
=p/q
so the answer is B
(a) (-8a^4b^3)(-9a^3b^2)
=-8a^4*b^3*-9a^3*b^2
=72a^7*b^5
=72a^7b^5
2.find the value of the following:
(a) -8^4
=-8*-8*-8*-8
=64*-8*-8
=-512*-8
=4096
(b) (2^6)^5/(2^7)^4
=2^30/2^28
=2^2/2
=4/2
=2
3.p^2xpq/(p^2q^2)=
A. pq
B. p/q
C. 1/pq^2
D. 1/p^2q
if p=2,q=3
p^2xpq/(p^2q^2)
=2^2x(2x3)/(2^2x3^2)
=4x6/(4x9)
=4x6/36
=24/36
=2/3
=p/q
so the answer is B
參考: My Maths knowledge
收錄日期: 2021-04-12 20:39:01
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