{ x2 - [ 62 - ( 82 - 9.7 )3 - 7.5 ]3 - 5.3 }3 = 1
giúp vs ạ
1. Tìm y, biết:
a) 48751 - (10425 + y) = 3828 : 12
b) (2367 - y) - (210 - 7) = 152 - 20
2. Tìm số tự nhiên x biết rằng: 8.6 + 288 : (x - 3)2 = 50
3. Tìm số tự nhiên x biết rằng: {x2 - [62 - (82 - 9.7)2 - 7.5]3 - 5.3}3 = 1
4. Tìm số tự nhiên x và y biết rằng:
a) 663.851 : x = 897 b) 9187 - y : 409 = 892 - 102 5.Xét xem các đẳng thức đúng hai:
a) 102+112+122 = 132+142
b) 152+162+172 = 182+192
c) 212+222+232+242 = 252+262+272
Bài 1:
a: Ta có: \(48751-\left(10425+y\right)=3828:12\)
\(\Leftrightarrow y+10425=48751-319=48432\)
hay y=38007
b: Ta có: \(\left(2367-y\right)-\left(2^{10}-7\right)=15^2-20\)
\(\Leftrightarrow2367-y=1222\)
hay y=1145
Bài 2:
Ta có: \(8\cdot6+288:\left(x-3\right)^2=50\)
\(\Leftrightarrow288:\left(x-3\right)^2=2\)
\(\Leftrightarrow\left(x-3\right)^2=144\)
\(\Leftrightarrow\left[{}\begin{matrix}x-3=12\\x-3=-12\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=15\\x=-9\end{matrix}\right.\)
{x^2 -[6^2 -( 8^2- 9.7 ) ^3 -7.5 ]^3-5.3}?^3=1
{x^2-[6^2-(8^2-9.7)^3-7.5]-5.3}^3=1
{ x2 - [ 62 - ( 82 -9.7 )3 -7.5 ]3 -5.3 }3 =1 ... {x2 - [62 - 13 -7.5]3 - 5.3}3=1. {x2 - [36 - 1 -7.5]3 - 5.3}3=1. {x2 - [36 - 1 - 35]3 - 5.3}3=1. {x2 - [35 - 35]3 -5.3}3=1. {x2 - 03 - 5.3}3=1. {x2 - 0 -5.3}3=1. {x2 - 0 - 15}3=1. {x.x - 0 - 15}3=1. {x.x + 0+15}3=1. {x.x +15}3=1.
{x mũ 2 - [6 mũ 2 - (8 mũ 2 - 9.7) mũ 3 - 7.5] mũ 3 - 5.3} mũ 3 = 1
{x^2−[6^2−(8^2−9⋅7)^3−7⋅5]^3−5⋅3}^3=1
⇒x^2−[36−(64−63)^3−35]^3−15=1
⇒x^2−[36−35−1^3]^3=16
⇒x^2−0^3=16
⇒x^2=16
⇒x=±4
Hok tốt
{ x2 - [ 62 - ( 82 - 9.7 )3 - 7.5 ]3 - 5.3 }3 = 1
Mong mọi ng giúp ạ....
\(\left\{x^2-\left[6^2-\left(8^2-9.7\right)^3-7.5\right]^3-5.3\right\}^3=1\)
\(\Leftrightarrow\left\{x^2-\left[6^2-\left(8^2-\left(8+1\right).\left(8-1\right)\right)^3-\left(6+1\right).\left(6-1\right)\right]^3-5.3\right\}^3=1\)
\(\Leftrightarrow\left\{x^2-\left[6^2-\left(8^2-8^2+1\right)^3-6^2+1\right]^3-5.3\right\}^3=1\)
\(\Leftrightarrow\left\{x^2-\left[6^2-1-6^2+1\right]^3-5.3\right\}^3=1\)
\(\Leftrightarrow\left\{x^2-5.3\right\}^3=1\)
\(\Leftrightarrow x^2-15=1\)
\(\Leftrightarrow x^2=16\)
\(\Leftrightarrow\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
\(\left\{x^2-\left[6^2-\left(8^2-9.7\right)-7.5\right]^3-5.3\right\}^3=1\)
\(\Rightarrow x^2-\left[6^2-\left(64-63\right)^3-35\right]^3-5.3=1\)
\(\Rightarrow x^2-\left(36-1^3-35\right)^3-15=1\)
\(\Rightarrow x^2-0^3-15=1\)
\(\Rightarrow x^2=1+15\)
\(\Rightarrow x^2=16\)
\(\Rightarrow\orbr{\begin{cases}x=4\\x=-4\end{cases}}\)
{ x2 - [ 62 - ( 82 - 9 . 7 )3 - 7 . 5 ]3 - 5 . 3 }3 = 1
{ x2 - [ 36 - ( 64 - 63 )3 - 35 ]3 - 15 }3 = 1
{ x2 - [ 36 - 13 - 35 ]3 - 15 }3 = 1
{ x2 - [ 36 - 1 - 35 ]3 - 15 }3 = 1
{ x2 - 0 - 15 }3 = 1
{ x2 - 1 - 15 }3 = 1
=> x2 - 15 = 1
=> x2 = 16
=> x = { 4 ; -4 }
tính
a,8.6+288:(x-)^2=50
b,{x^2-[6^2-(8^2-9.7)^3-7.5]^3-5.3)^3=1^3
a,8.6+288:(x-3)^2=50
48+288:(x-3)^2=50
288:(x-3)^2=2
(x-3^2=288:2
(x-3)^2=144=12^2
x=12+3
=>x=15
x=100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Tìm x:
{x2-[62(82-9.7)3-7.5]3-5.3}^3=1
<=>{x2-[62(64-63)3-35]3-15}3=1
<=>[x2-(62.13-35)3-15]3=1
<=>[x2-(36-35)3-15]3=1
<=>(x2-1-15)3=1
<=>(x2-16)=\(\sqrt{1}=1\)
=>x2=17=>x=\(\sqrt{17}\)
{ x 2 - [ 6 2 - ( 8 2 - 9.7 ) 3 -7.5 ] 3 - 5.3 }3 =5
tìm x biết {x2-[62-(82-9.7)37.5)3-5.33} = 1