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a, 48.84
= (22)8.(23)4
= 216.212
= 228
b, 415.515
= (4.5)15
= 2015
c, 210.15 + 210.85
= 210.(15 + 85)
= 210.100
=210.(2.5)2
= 212.52
d, 33.92
= 33 . (32)2
= 33.34
= 37
e, 512.7 - 511.10
= 511.(5.7 - 10)
= 511.25
=511.52
=513
f, \(x^1\).\(x^2\).\(x^3\)....\(x^{100}\)
= \(x^{1+2+3+...+100}\)
= \(x^{\left(1+100\right).100:2}\)
= \(x^{5050}\)
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.
\(a.765.5=153.5^2\)
\(b.837.7.7=93.21^2\)
\(c.568.8.2.4=71.8.2^6=71.2^9\)
512 x 7-511 x 10=511 x (5x7-10)
= 511 x 25
= 511 x 52
= 513
\(1111=1000+100+10+1=10^3+10^2+10^1+1\)
\(1247=1000+2\times100+4\times10+7=10^3+2\times10^2+4\times10^1+7\)
\(1543=1000+5\times100+4\times10+3=10^3+5\times10^2+4\times10^1+3\)
\(1794=1000+7\times100+9\times10+4=10^3+7\times10^2+9\times10^1+4\)
\(1876=1000+8\times100+7\times10+6=10^3+8\times10^2+7\times10^1+6\)
\(1008=1000+8=10^3+8\)
\(1080=1000+8\times10=10^3+8\times10^1\)
\(1709=1000+7\times100+9=10^3+7\times10^2+9\)
\(1500=1000+5\times100=10^3+5\times10^2\)
\(1097=1000+9\times10+7=10^3+9\times10^1+7\)
\(20000=2\times10000=2\times10^4\)
\(27000=2\times10000+7\times1000=2\times10^4+7\times10^3\)
\(28700=2\times10000+8\times1000+7\times100\)
\(24004=2\times10000+4\times1000+4=2\times10^4+4\times10^3+4\)
\(26013=2\times10000+6\times1000+1\times10+3=2\times10^4+6\times10^3+10^1+3\)
\(20508=2\times10000+5\times100+8=2\times10^4+5\times10^2+8\)
\(20358=2\times10000+3\times100+5\times10+8=2\times10^4+3\times10^2+5\times10^1+8\)
\(20009=2\times10000+9=2\times10^4+9\)
\(29830=2\times10000+9\times1000+8\times100+3\times10=2\times10^4+9\times10^3+8\times10^2+3\times10^1\)
\(25763=2\times10000+5\times1000+7\times100+6\times10+3=2\times10^4+5\times10^3+7\times10^2+6\times10^1+3\)
mình đang cần gấp giúp mình với, trả lời thì mình tích ngay lập tức
`a)5^11 .5^4=5^{11+4}=5^15`
`b)11^7 .11^5=11^{7+5}=11^12`
`c)3.9.27.81=3.3^2 .3^3 . 3^4=3^{1+2+3+4}=3^10`
`d)5^16 :5^12 .5^2=5^{16-12+2}=5^8`
\(5^{11}.5^4=5^{11+4}=5^{15}\)
\(11^7.11^5=11^{7+5}=11^{12}\)
`\(3.9.27.81=3^1.3^2.3^3.3^4=3^{1+2+3+4}=3^{10}\)
\(5^{16}:5^{12}.5^2=5^{16-12+2}=5^6\)