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\(x^4\cdot x^7\cdot...\cdot x^{100}\)
\(=x^{4+7+...+100}\)
\(=x^{52\cdot33}=x^{1716}\)
\(x^1\cdot x^2\cdot x^3\cdot...\cdot x^{2006}\)
Ta có : \(x^1\cdot x^2=x^{1+2}=x^3\)
Tương tự : \(x^1\cdot x^2\cdot x^3=x^{1+2+3}=x^6\)
Áp dụng vào bài toán :
\(x^1\cdot x^2\cdot x^3\cdot...\cdot x^{2006}=x^{1+2+3+...+2006}\)
\(\Rightarrow x^{1+2+3+...+2006}=x^{2013021}\)
a)\(5x\cdot5x\cdot5x=\left(5x\right)^3\)
b) \(x^1\cdot x^2\cdot...\cdot x^{2006}=x^{1+2+3+...+2006}=x^{2013021}\)
c)\(x\cdot x^4\cdot x^7\cdot...\cdot x^{100}=x^{1+4+7+...+100}=x^{101\cdot17}=x^{1717}\)
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, \(x^1\).\(x^2\).\(x^3\)....\(x^{100}\)
= \(x^{1+2+3+...+100}\)
= \(x^{\left(1+100\right).100:2}\)
= \(x^{5050}\)
a)\(3.3.3.4.4.4=3^3.4^3=12^3\)
b)\(a.a.a+b.b.b.b=a^3+b^4\)
Chúc hk tốt nha!!!
Bài 1 :
a/ \(a^3.a^9=a^{3+9}=a^{12}\)
b/\(\left(a^5\right)^7=a^{5.7}=a^{35}\)
c/ \(\left(a^6\right).4.a^{12}=a^{24}.a^{12}.4=a^{24+12}.4=a^{36}.4\)
d/ \(\left(2^3\right)^5.\left(2^3\right)^3=2^{15}.2^9=2^{15+9}=2^{24}\)
e/ \(5^6:5^3+3^3.3^2\)
\(=5^3+3^5=125+243=368\)
i/ \(4.5^2-2.3^2\)
\(=2^2.5^2-2.3^2\)
\(=2^2.25-2^2.14\)
\(=2^2.\left(25-14\right)\)
\(=2^2.11\)
\(=4.11=44\)
a,\(x.x^4.x^7..............x^{100}\)
\(=x^{1+4+7+....+100}=x^{\left(100+1\right).34:2}\)
\(=x^{101.17}=x^{1717}\)
b, \(x^1.x^2..............x^{2006}\)
\(=x^{1+2+3+...+2006}=x^{\left(2006+1\right).2006:2}\)
\(=x^{2007.1003}=x^{2013021}\)
c, \(x^2.x^5.x^8..................x^{2003}\)
\(=x^{2+5+8+......+2003}=x^{\left(2003+2\right).668:2}\)
\(=x^{2005.334}=x^{669670}\)
Chúc bạn học tốt!!!
Cảm ơn bn nha