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\(=\frac{11.3^{29}-3^{30}}{2^2.3^{28}}=\frac{11.3^{29}-3^{29}.3}{2^2.3^{28}}=\frac{3^{29}\left(11-3\right)}{2^2.3^{28}}=\frac{3^{29}.2^3}{2^2.3^{28}}=\frac{3.2}{1.1}=6\)
\(B=\frac{2^{10}\cdot55-2^{10}}{2^8\cdot27}=\frac{2^{10}\left(55-1\right)}{2^8\cdot3^3}=\frac{2^{10}\cdot2\cdot3^3}{2^8\cdot3^3}=\frac{2^{11}\cdot3^3}{2^8\cdot3^3}=2^3=8.\)
\(C=\frac{\left(3\cdot4\cdot24\right)^2}{5\cdot2^5\cdot4^2-16^2}=\frac{288^2}{5\cdot16\cdot2^3.16-16^2}=\frac{2^5\cdot3^2}{16^2\left(5\cdot2^3-1\right)}=\frac{16\cdot2\cdot9}{16\cdot16\left(5\cdot8-1\right)}\)
\(=\frac{16\cdot2\cdot9}{16\cdot16\cdot39}=\frac{16\cdot2\cdot9}{16\cdot2^4\cdot13\cdot3}=\frac{1\cdot3}{2^3\cdot13\cdot1}=\frac{3}{8\cdot13\cdot1}=\frac{3}{104}\)
\(D=\frac{11\cdot3^{22}\cdot3^7-9^{14}}{\left(2\cdot3^{14}\right)^2}=\frac{11\cdot3^{30}-3^{28}}{2^2\cdot3^{28}}=\frac{3^{28}\left(11\cdot3^2-1\right)}{4\cdot3^{38}}=\frac{3^{28}\left(11\cdot9-1\right)}{4\cdot3^{28}}=\frac{99-1}{4}=\frac{98}{4}=24,5\)
(19x+2.5^2):14=(13-8)^2-4^2
(19x+2.25):14=5^2-16
(19x+50):14=25-16
(19x+50):14=9
19x+50=126
19x=76
x=4
(19x+2.5^2):14=(13-8)^2-4^2
=>(19x+2.25):14=5^2-4^2
=>(19x+50):14=(5-4).(5+4)
=>19x+50=1.9.14=126
=>19x=126-50=76
=>x=76:19=4
k nha
1.(19x+2.52):14=(13-8)2-42
(19x+2.25):14=52-16
(19x+50):14=25-16
(19x-50):14=9
19x+50=9.14
19x+50=126
19x=126-50
19x=76
x=76:19
x=4 thuộc Z( bạn viết kí hiệu nha!!)
Vậy...
2.-2x3-6=42.3
-2x3-6=16.3
-2x3-6=48
-2x3=48+6
-2x3=54
x3=54:(-2)
x3= -27
x3=(-3)3
=>x= -3 thuộc Z (như trên nha!!)
Vậy...
Chúc bạn học tốt!!
k đúng cho mình nha!!
\(19x+22\times3:14=11-6^2\)
\(\Leftrightarrow19x+66:14=11-36\)
\(\Leftrightarrow19x+\dfrac{33}{7}=-25\)
\(\Leftrightarrow19x=-25-\dfrac{33}{7}\)
\(\Leftrightarrow19x=-\dfrac{208}{7}\)
\(\Leftrightarrow x=\dfrac{-\dfrac{208}{7}}{19}\)
\(\Leftrightarrow x=-\dfrac{208}{133}\)