7.7^n+1=343
2.3^n=10.3^12+8.27
Những câu hỏi liên quan
2.3^x =10.3^12 +8.27^4
2. 3^x = 10.3^12 + 8.27^4
\(2.3^x=10.3^{12}+8.27^4\)
\(2.3^x=10.3^{12}+8.3^{12}\)
\(2.3^x=3^{12}\left(10+8\right)\)
\(2.3^x=18.3^{12}\)
\(3^x=9.3^{12}\)
\(3^x=3^{14}\)
\(x=14\)
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2.3^x=10.3^12+8^27^4
2.3^x=10.3^4.3+8.27^4
2.3^x=10.27^4+8.27^4
2.3^x=(10+8).27^4
2.3^x=18.27^4
2.3^x=2.9.3^12
2.3^x=2.3^2.3^12
2.3^x=2.3^14
x=14
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tìm x 2.3^x=10.3^12+8.27^4
\(2.3^x=10\cdot3^{12}+8.27^4\)
\(10.3^{12}+8.27^4=10.3^{12}+8.3^{12}\)
\(10.3^{12}+8.3^{12}=3^{12}\cdot\left(10+8\right)=3^{12}\cdot18=3^{12}\cdot2\cdot3^2=3^{14}\cdot2\)
=>x = 14
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2.3 mũ x =10.3 mũ 12 + 8.27 mũ 4
2.3x = 10.312 + 8.274
=> 2.3x = 10.312 + 23 . (33)4
=> 2.3x = 10.312 + 8.312
=> 2.3x = (10 + 8).312
=> 2.3x = 18.312
=> 2.3x = 2.32 . 312
=> 2.3x = 2.314
=> x = 14
\(2.3^x=10.3^{12}+8.27^4\)
\(\Leftrightarrow2.3^x=2.5.3^{12}+2^3.\left(3^3\right)^4\)
\(\Leftrightarrow2.3^x=2.5.3^{12}+2^3.3^{12}\)
\(\Leftrightarrow2.3^x=2.3^{12}\left(5+2^2\right)\)
\(\Leftrightarrow2.3^x=2.3^{12}.9\)
\(\Leftrightarrow2.3^x=2.3^{12}.3^2\)
\(\Leftrightarrow2.3^x=2.3^{14}\)
\(\Leftrightarrow x=14\)
Vậy x=14
Hok Tốt !!!!!!!!!!!!!!!!!!!!!!!
\(2\cdot3^x=10\cdot3^{12}+8\cdot27^4\)
\(2\cdot3^x=2\cdot5\cdot3^{12}+2^3\cdot\left(3^3\right)^4\)
\(2\cdot3^x=2\cdot5\cdot3^{12}+2^3\cdot3^{12}\)
\(2\cdot3^x=2\cdot3^{12}\left(5+2^2\right)\)
\(3^x=3^{12}\left(5+4\right)\)
\(3^x=3^{12}\cdot9\)
\(3^x=3^{12}\cdot3^2\)
\(3^x=3^{14}\)
x = 14
Xem thêm câu trả lời
2.3 mũ x = 10.3 mũ 12 + 8.27 mũ 4
2.3x = 10.312 + 8.274
=> 2.3x = 10.312 + 8.(33)4
=> 2.3x = 10.312 + 8.312
=> 2.3x = (10 + 8).312
=> 2.3x = 18.312
=> 3x = 18 : 2.312
=> 3x = 9.312
=> 3x = 32.312
=> 3x = 314
=> x = 14
vậy_
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tìm x
2.3^x = 10.3^12+8.27^4
<=>2.3x=9565938 tính ra số hơi to ^^
=>3x2=2.4782696 ( 2 vế rút gọn 2 )
=>3x=4782969
=>x=14
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2.4^x=10.3^12 +8.27^4
tìm x nha
2.3x=10.312+8.274
2.3x = 10.312 + 8.274
2.3x = 2 . 5 .312 + 23 .312
2.3x = 2 .312 (5+22)
2.3x = 2.312 . 9
2.3x = 2.314
3x = 2.314 : 2
3x = 314
=> x = 14.
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\(2.3^x=10.3^{12}+8.27^4\)
\(\Rightarrow2.3^x=10.3^{12}+8.\left(3^3\right)^4\)
\(\Rightarrow2.3^x=10.3^{12}+8.3^{12}\)
\(\Rightarrow2.3^x=18.3^{12}\)
\(\Rightarrow2.3^x=2.3^{14}\)
\(\Rightarrow3^x=3^{14}\)
\(\Rightarrow x=14\)
Vậy x = 14
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Ta có: 2.3x = 10.312 + 8.274
=> 2.3x = 10.312 + 23.(33)4
=> 2.3x = 10.312 + 23 . 312
=> 3x = 10.312 + 23.312 : 2
=> 3x = 5314410 + 2125764
=> 3x = 7440174
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2.3x=10.312+8.274
2.3x=10.312+8.274
2.3x=10.312+8.(33)4
2.3x=10.312+8.312
2.3x=(10+8).312
2.3x=18.531441
2.3x=9565938
3x=9565838:2
3x=4782969
3x=314
=>x=14
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