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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. (-2).(-2).(-2).(-2).(-2).(-2) = (-2)6
b. (-4).(-4).(-4).(-4).(-5).(-5).(-5).(-5) = (-4)4.(-5)4=204
c. (-8).(-3)3.(-27) = (-2)3.(-3)3.(-3)3 = (-2)3.93 = (-18)3
d. (+49).(+7).(-2)3.27 = 72.7.(-2)3.33 = 73.(-2)3.33 = (-42)3
a) (-2) . (-2) . (-2) . (-2) . (-2) . (-2)
= (-2)\(^6\)
b) (-4) . (-4) . (-4) . (-4) . (-5) . (-5) . (-5) . (-5)
= (-4)\(^4\). (-5)\(^4\)
c) (-8) . (-3)\(^3\). (-27)
= (-2) . (-2) . (-2) . (-27) . (-27)
= (-2)\(^3\) . (-27)\(^2\)
d) 49 . 7 . (-2)\(^3\). 27
= 7 . 7 . 7 . (-2)\(^3\). 3 . 3 . 3
= 7\(^3\). (-2)\(^3\). 3\(^3\)
chúc bạn học tốt!!!
8=2^3 ; 20=20^1 ; 60=60^1 ; 90=90^1
16=2^4 ; 27=3^3 ; 81=3^4 ; 100=10^2
l) 27^8=(33)8=324
=>278:322=324:322
=324-22=32
m) 8^4=(23)4=212
45=(22)5=210
=>84:45=212:210
=212-10=22
a) \(27^8:3^{22}\)
\(=\left(3^3\right)^8:3^{22}\)
\(=3^{24}:3^{22}=3^{24-22}\)
\(=3^2\)
b) \(8^4:4^5\)
\(=\left(2^3\right)^4:\left(2^2\right)^5\)
\(=2^{12}:2^{10}=2^{12-10}=2^2\)
a) 3.32.33.....3100=31+2+...+100
b)x.x3.x5.....x49=x1+3+5+...+49
82.324
= (23)2 . (25)4
= 26.220 = 26+20
= 226
b) 815:97
= (92)5:97
= 910:97 = 910-7
= 93
a) 82 . 324 = ( 23)2 . ( 25)4 = 26 . 220 = 226
b) 815 : 97 = ( 34)5 . ( 32)7 = 320 . 314 = 334
Chúc học tốt
a) \(...=10^5.10^2.10^2=10^9\)
b) \(...=\left(2^2.3\right).\left(2^2.3\right).\left(2^2.3\right).2.3=2^7.3^4\)
c) \(...=5^2.5.2^2.2.2.5=2^4.5^4\)
d) \(...=7.3.2.5.2.5.3.5.2.5=2^33^2.5^4.7\)
a/
\(100000.100.10.10=10^5.10^2.10.10=10^9=2^9.5^9\)
b/
\(12.12.12.6=2^2.3.2^2.3.2^2.3.2.3=2^7.3^4\)
c/
\(25.5.4.2.10=5^2.5.2^2.2.2.5=2^4.5^4\)
d/
\(210.10.3.5.10=21.10.10.3.5.10=3.7.2.5.2.5.3.5.2.5=2^3.3^2.5^4.7\)