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A)3^3. 7^7
B)4^9. 3^21
C)2^4036
D)x.x.x.x.y.y=x^4. y^2
E)a.a^3.a.a.a.b.b.b=a^7.b^3
a, \(3^4\)
b, \(8^7:8^2\)
c, \(x^3.x^2.x\)
d, \(4^n.4^2\)
e, \(3^{k+2}:3^k\)
a, 3^4
b,8^7:8^2=8^5
c, x^3.x^2.x=x^6
d,4^n.4^2=4^(n+2)
e, 3^k+2:3^k
=3^k.(1+2)
=3^k.3
=3^(k+10
Mấy bài này đẽ ẹc mà !!!
a) \(7^5.7^6=7^{5+6}=7^{11}\)
b) \(5^{20}.5=5^{20+1}=5^{21}\)
c) \(7^9:7=7^{9-1}=7^8\)
d) \(25^3.5^2=\left(5^2\right)^3.5^2=5^{2.3}.5^2=5^6.5^2=5^{6+2}=5^8\)
a)152*32*53
=152*32*52*5
=152*(3*5)2*5
=152*152*5
=154*5
b)93*32*63*22
=(9*6)3*(3*2)2
=543*62
=(6*9)3*62
=63*93*62
=65*93
c)82*23
=82*8
=83
d)103*23*52
=(2*5)3*23*52
=23*53*23*52
=26*55
\(A=8^2.32^4=2^6.2^{20}=2^{26}\)
\(\Rightarrow2^{26}\)
\(B=27^3.9^4.243=3^9.3^8.3^5=3^{22}\)
\(\Rightarrow3^{22}\)
TL
a . x ∈ ∅ b . x=-10, x=-5177/5000, x=-10173/10000.
HT
a) \(a^2\cdot a^3\cdot a^7\cdot b^2\cdot b\)
\(=\left(a^2\cdot a^3\cdot a^7\right)\cdot\left(b^2\cdot b\right)\)
\(=a^{12}\cdot b^3\)
b) \(b^6\cdot b\cdot c^7\cdot c^8\)
\(=\left(b^6\cdot b\right)\cdot\left(c^7\cdot c^8\right)\)
\(=b^7\cdot c^{15}\)
c) \(a^8\cdot a^9\cdot a\cdot c\cdot c^{20}\)
\(=\left(a^8\cdot a^9\cdot a\right)\cdot\left(c\cdot c^{20}\right)\)
\(=a^{18}\cdot c^{21}\)
d) \(a^2\cdot a^3\cdot b^4\cdot c\cdot c^3\)
\(=\left(a^2\cdot a^3\right)\cdot b^4\cdot\left(c\cdot c^3\right)\)
\(=a^5\cdot b^4\cdot c^4\)
a) Kiểm tra lại nhé
b) \(b^6.b^7.c^8\)
\(=b^{6+7}.c^8=b^{13}.c^8\)
c) \(a^8.a^9.a.c.c^{20}\)
\(=a^{8+9+1}.c^{1+20}\)
\(=a^{18}.c^{21}\)
d) \(a^2.a^3.b^4.c.c^3\)
\(=a^{2+3}.b^4.c^{1+3}\)
\(=a^5.b^4.c^4\)
\(#WendyDang\)