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65 - 4 x + 2 = 2015 0
=> 65 - 4 x + 2 = 1
=> 4 x + 2 = 64
=> 4 x + 2 = 4 3
=> x + 2 = 3
=> x = 1
65-4^x+2=2015^0
<=>65-4^x+2=1
<=>4^x+2=65-1=64
<=>2^2x+4=2^6
=>2x+4=6
<=>2x=2
<=>x=1
1, 4\(^{x+1}\) + 4\(^0\) = 65
\(\Rightarrow\)4\(^{x+1}\) = 65 - 1
\(\Rightarrow\)x + 1 = 64 : 4
\(\Rightarrow\)x + 1 = 16
\(\Rightarrow\)x = 15
2) 10 + 2x = 16\(^{^2}\): 4\(^3\)
\(\Rightarrow\)10 + 2x = 4
\(\Rightarrow\)2x = 4 - 10
\(\Rightarrow\)2x = -6
\(\Rightarrow\)x = -3
1. Tính theo cách hợp lí:
\(2016.5^{2017}.\left(30.5^{2015}-5^{2016}\right)\)
\(=2016.5^{2017}.5^{2015}.\left(30-5\right)\)
\(=2016.5^{4032}.25\)
\(=2016.5^{4032}.5^2\)
\(=2016.5^{4034}\)
2. Tìm x:
\(4^{x+1}+4^0=65\)
\(\Leftrightarrow4^{x+1}+1=65\)
\(\Leftrightarrow4^{x+1}=65-1\)
\(\Leftrightarrow\left(2^2\right)^{x+1}=64\)
\(\Leftrightarrow2^{2x+2}=2^6\)
\(\Rightarrow2x+2=6\)
\(\Rightarrow2x=4\)
\(\Rightarrow x=2.\)
a,10+2x=45:43
10+2x=42
10+2x=16
2x=16-10
2x=6
x=6:2
x=3
b,310-(20-x)=300
20-x =310-300
20-x =10
x=20-10
x=10
c,4x+1+40=65
4x+1+40=65
4x+1+1 =65
4x+1 =65-1
4x+1 =64
4x+1 =43
x =3-1
=> x =2
a) 10 + 2x = 45 : 43
10 + 2x = 42 = 16
2x = 16 - 10
2x = 6
x = 3
b) 310 - (20 - x) = 300
310 - 20 + x = 300
290 + x = 300
x = 300 - 290
x = 10
c) 4x + 1 + 40 = 65
4x + + 1 = 65
4x + 1 = 64 = 43
=> x + 1 = 3
=> x = 2
a) (5x - 12 ) : 4 = 318 : 315
( 5x - 12 ) : 4 = 33
( 5x - 12 ) : 4 = 27
5x - 12 = 108
5x = 120
x = 24
b) 5x3 - 102 = 35
5x3 - 100 = 35
5x3 = 135
x3 = 27
x3 = 33
=> x = 3
c) 65 - 4x+2 = 20180
65 - 4x+2 = 1
4x+2 = 64
4x+2 = 43
x + 2 = 3
=> x = 1
d) 2x+1 - 2x = 32
2x . ( 2 - 1 ) = 32
2x . 1 = 32
2x = 32
2x = 25
=> x = 5
\(65-4^{x+1}=2019^0\)
\(\Rightarrow65-4^{x+1}=1\)
\(\Rightarrow4^{x+1}=65-1\)
\(\Rightarrow4^{x+1}=64\)
\(\Rightarrow4^{x+1}=4^3\)
\(\Rightarrow x+1=4\)
\(\Rightarrow x=4-1\)
\(\Rightarrow x=3\)
Vậy x = 3
_Chúc bạn học tốt_
\(65-4^{x+1}=2019^0\)
\(65-4^x.4=1\)
\(4^x.4=65-1\)
\(4^x.4=64\)
\(4^x=64:4\)
\(4^x=16\)
\(4^x=4^2\)
\(\Rightarrow x=2\)
??????????
k di khac tra loi!!!:p
65 - 4x + 2 = 20150
65 - 4x + 2 = 1
4x + 2 = 65 - 1 = 64
4x + 2 = 44
=> x + 2 = 4
=> x = 2