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bài 11
\(6.6.6.6=6^4\) '\(b.5.15.15.15.3=15.15.15.15=15^4\)
\(c.81.3.3.3=3^4.3^3=3^7\)
bài 12.
\(a.765.5=153.5^2\)
\(b.837.7.7=93.21^2\)
\(c.568.8.2.4=71.8.2^6=71.2^9\)
a. \(12^2.3^2.2^3=2^4.3^2.3^2.2^3=2^7.3^4\)
b. \(8^3.3^2.6^3=2^9.3^2.2^3.3^3=2^{12}.3^5\)
c. \(5^{32}.5^2=5^{34}\)
d. \(100^6.2^3=\left(2^2.5^2\right)^6.2^3=2^8.5^8.2^3=2^{11}.5^8\)
e. \(100^2:10^2:5^2=\left(10.5.2\right)^2:10^2:5^2=2^2\)
f. \(121^3-11^2=11^6-11^2=11^2\left(11^4-1\right)\)
\(a,11^8:11^3=11^5\)
\(b,17^{11}:17^9=17^2\)
\(c,4^3:2^2=\left(2^2\right)^3:2^2=2^6:2^2=2^4\)
\(d,a^5:a=a^4\)
!!!
\(a)11^8\div11^3=11^{8-3}=11^5\)
\(b)17^{11}\div17^9=17^{11-9}=17^2\)
\(c)4^3\div2^2=4^3\div4=4^2\)
\(d)a^5\div a=a^4\)
a,\(11^4\cdot11^6=11^{10}\) ; \(3^5\cdot9=3^5\cdot3^2=3^7\)
b, \(8^{20}\cdot8^{12}=8^{32}\) ; \(16:2^2=2^4:2^2=2^2\)
c, \(6^3\cdot2\cdot6^4\) \(\cdot3=6^3\cdot6^4\cdot\left(2\cdot3\right)=6^3\cdot6^4\cdot6=6^8\)
a) 11⁴ x 11⁶ ; 3⁵ x 9 = 3^5 x 3^2= 3^7 ( 5+2)
= 11^10 ( 4+6)
b) 8²⁰ x 8¹² ; 16 : 2² = 2^4 : 2^2 = 2^2 ( 4-2)
= 8^32 ( 20+12)
c) 6³ x 2x 6⁴ x 3 = 6^3 x ( 2x3) x6^4
= 6^3 x 6^1 x 6^4
= 6^8 ( 3+1+4)