10-{[(x:3+17):10+3.24]:10}=5
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10-{[(x:3+17):10+3.24]:10}=5
a: Ta có: 10−{[(x:3+17):10+3·24]:10}=5
⇔[(x:3+17):10+48]:10=5
⇔(x:3+17):10+48=50
⇔(x:3+17):10=2
⇔x:3+17=20
⇔x:3=3
\(\Leftrightarrow\) X=3.3
\(\Leftrightarrow\) X= 9
Vậy x= 9
Hoktot~
a) 10-{[(x:3+17):10+3.24 ]:10}=5
b) 2448:[119-(x-6)]=24
c)165-(35:x+3).19=13
a: Ta có: \(10-\left\{\left[\left(x:3+17\right):10+3\cdot2^4\right]:10\right\}=5\)
\(\Leftrightarrow\left[\left(x:3+17\right):10+48\right]:10=5\)
\(\Leftrightarrow\left(x:3+17\right):10+48=50\)
\(\Leftrightarrow\left(x:3+17\right):10=2\)
\(\Leftrightarrow x:3+17=20\)
\(\Leftrightarrow x:3=3\)
hay x=9
b: Ta có: \(2448:\left[119-\left(x-6\right)\right]=24\)
\(\Leftrightarrow119-\left(x-6\right)=102\)
\(\Leftrightarrow x-6=17\)
hay x=23
c: Ta có: \(165-\left(35:x+3\right)\cdot19=13\)
\(\Leftrightarrow\left(35:x+3\right)\cdot19=152\)
\(\Leftrightarrow\left(35:x+3\right)=8\)
\(\Leftrightarrow35:x=5\)
hay x=7
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So sánh các số sau:
a, 2^30+3^30+4^30 và 3.24^10
b, 3^34 và 5^20
c, 71^5 và 17^20
giải rõ ràng mình mới tick
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tim x biet
3/(x+2).(x+5) + 5/(x+5).(x+10) + 7/(x+10).(x+17) = x/(x+2).(x+17)
Với x thuộc tập hợp A = -2;-5;-10;-17
3/(x+2)(x+5)+5/(x+5)(x+10)+7/(x+10)(x+17)=x/(x+2)(x+17)
\(\frac{3}{\left(x+2\right)\left(x+5\right)}+\frac{5}{\left(x+5\right)\left(x+10\right)}+\frac{7}{\left(x+10\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
\(\Leftrightarrow\frac{1}{x+2}-\frac{1}{x+5}+\frac{1}{x+5}-\frac{1}{x+10}+\frac{1}{x+10}-\frac{1}{x+17}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
\(\Leftrightarrow\frac{1}{x+2}-\frac{1}{x+17}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
\(\Leftrightarrow\frac{x+17-x-2}{\left(x+2\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
\(\Leftrightarrow\frac{15}{\left(x+2\right)\left(x+17\right)}=\frac{x}{\left(x+2\right)\left(x+17\right)}\)
<=> x = 15
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3/((x+2)(x+5))+5/((x+5)(x+10))+7/((x+10)(x+17))=x/((x+2)(x+17))
3/(x+2).(x+3) + 5/(x+5).(x+10) + 7/(x+10).(x+17) = x/(x+2).(x+17)
Tìm x:
3/(x+2).(x+3) + 5/(x+5).(x+10) + 7/(x+10).(x+17) = x/(x+2).(x+17)
10-{[(x:3+17):10+3.16]:10}=5
10-{[(x:3+17):10+3.16]:10}=5
{[(x:3+17):10+3.16]:10}=10-5
{[(x:3+17):10+3.16]:10}=5
[(x:3+17):10+3.16] =5.10
[(x:3+17):10+3.16] =50
[(x:3+17):10+48] =50
(x:3+17):10 =50-48
(x:3+17):10 =2
x:3+17 =10.2
x:3+17 =20
x:3 =20-17
x:3 =3
x =3.3
x =
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