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\(=\frac{\left(3.4.12^{16}\right)^2}{11.2^{13}.4^{11}-16^9}\)
\(=\frac{3^2.4^2.12^{32}}{11.2^{13}.2^{22}-2^{26}}\)
\(=\frac{3^2.2^4.2^{64}.3^{32}}{11.2^{35}-2^{26}}\)
\(=\frac{3^{34}.2^{68}}{2^{26}\left(11.2^9-1\right)}\)
\(=\frac{3^{34}.2^{42}}{11.2^9-1}\)
Còn lại làm típ nha :)
520 : ( 515 . 6 + 515 . 19)
=5^20: [5^15(6+19)]
=5^20:5^15.5^2
=5^3
\(5^{20}\div\left(5^{15}.6+5^{15}.19\right)\)
\(=\)\(5^{20}\div\left[5^{15}.\left(6+19\right)\right]\)
\(=\)\(5^{20}\div\left[5^{15}.25\right]\)
\(=\)\(5^{20}\div\left[5^{15}.5^2\right]\)
\(=\)\(5^{20}\div5^{17}\)
\(=\)\(5^3\)
\(=\)\(125\)
Bài 1:
a) \(\frac{13.23-13}{26.21+26}\)=\(\frac{13.22}{26.22}\)=\(\frac{13}{26}\)=\(\frac{1}{2}\)
b) \(\frac{16.21-16}{4.19+4}\)=\(\frac{16.20}{4.20}\)=\(\frac{16}{4}\)= 4
\(16+\left(-6\right)+\left(-8\right)+7\)\(=16-6-8+7\)\(=\left(16-6\right)-\left(8-7\right)\)\(=10-1=9\)
\(\left(-8\right)-[\left(2015^0\right)-14+7]\)\(=-8-\left(1-14+7\right)\)\(=-8-\left(-6\right)=-2\)
\(\left(-31\right)-[82-\left(-17\right)]\)\(=-31-\left(82+17\right)\)\(=-31-99=-130\)
\(6\left(-2\right)^3+5\left(-4\right)-\left(-12\right)\)\(=6\left(-8\right)+\left(-20\right)+12\)\(=-48-20+12=-56\)
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