Tìm x: A) x⁶⁰=x⁵⁰ B)x¹⁸:128=x¹¹ C)180-(50:x+10):3=175 15/07/2021 Bởi Lydia Tìm x: A) x⁶⁰=x⁵⁰ B)x¹⁸:128=x¹¹ C)180-(50:x+10):3=175
Đáp án: a, [x=0x=±1[x=0x=±1 b, [x=0x=2[x=0x=2 c, x=10x=10 Giải thích các bước giải: a, x60=x50x60=x50 ⇔x60−x60=0⇔x60-x60=0 ⇔x50.(x10−1)=0⇔x50.(x10-1)=0 ⇔⇔ [x=0x=±1[x=0x=±1 Vậy: … b, x18:128=x11x18:128=x11 ⇔x18−128.x11=0⇔x18-128.x11=0 ⇔x11.(x7−128)=0⇔x11.(x7-128)=0 ⇔⇔ [x=0x=2[x=0x=2 Vậy: … c, 180−50:x+103=175180-50:x+103=175 ⇔540−(50:x+10)=525⇔540-(50:x+10)=525 ⇔540−50+10xx=525⇔540-50+10xx=525 ⇔540xx−50+10xx=525⇔540xx-50+10xx=525 ⇔540x−50−10xx=525⇔540x-50-10xx=525 ⇔−50+530x=525x⇔-50+530x=525x ⇔−50+530x−525x=0⇔-50+530x-525x=0 ⇔−50+5x=0⇔-50+5x=0 ⇔5x=50⇔5x=50 ⇔x=10⇔x=10 Vậy: … Bình luận
Đáp án: a, \(\left[ \begin{array}{l}x=0\\x=±1\end{array} \right.\) b, \(\left[ \begin{array}{l}x=0\\x=2\end{array} \right.\) c, `x=10` Giải thích các bước giải: a, `x^60=x^50` `<=> x^60-x^60=0` `<=> x^50.(x^10-1)=0` `<=>` \(\left[ \begin{array}{l}x=0\\x=±1\end{array} \right.\) Vậy: … b, `x^18:128=x^11` `<=> x^18-128.x^11=0` `<=> x^11.(x^7-128)=0` `<=>` \(\left[ \begin{array}{l}x=0\\x=2\end{array} \right.\) Vậy: … c, `180-\frac{50:x+10}{3}=175` `<=> 540-(50:x+10)=525` `<=> 540-\frac{50+10x}{x}=525` `<=> \frac{540x}{x}-\frac{50+10x}{x}=525` `<=> \frac{540x-50-10x}{x}=525` `<=> -50+530x=525x` `<=> -50+530x-525x=0` `<=> -50+5x=0` `<=> 5x=50` `<=> x=10` Vậy: … Bình luận
Đáp án:
a, [x=0x=±1[x=0x=±1
b, [x=0x=2[x=0x=2
c, x=10x=10
Giải thích các bước giải:
a, x60=x50x60=x50
⇔x60−x60=0⇔x60-x60=0
⇔x50.(x10−1)=0⇔x50.(x10-1)=0
⇔⇔ [x=0x=±1[x=0x=±1
Vậy: …
b, x18:128=x11x18:128=x11
⇔x18−128.x11=0⇔x18-128.x11=0
⇔x11.(x7−128)=0⇔x11.(x7-128)=0
⇔⇔ [x=0x=2[x=0x=2
Vậy: …
c, 180−50:x+103=175180-50:x+103=175
⇔540−(50:x+10)=525⇔540-(50:x+10)=525
⇔540−50+10xx=525⇔540-50+10xx=525
⇔540xx−50+10xx=525⇔540xx-50+10xx=525
⇔540x−50−10xx=525⇔540x-50-10xx=525
⇔−50+530x=525x⇔-50+530x=525x
⇔−50+530x−525x=0⇔-50+530x-525x=0
⇔−50+5x=0⇔-50+5x=0
⇔5x=50⇔5x=50
⇔x=10⇔x=10
Vậy: …
Đáp án:
a, \(\left[ \begin{array}{l}x=0\\x=±1\end{array} \right.\)
b, \(\left[ \begin{array}{l}x=0\\x=2\end{array} \right.\)
c, `x=10`
Giải thích các bước giải:
a, `x^60=x^50`
`<=> x^60-x^60=0`
`<=> x^50.(x^10-1)=0`
`<=>` \(\left[ \begin{array}{l}x=0\\x=±1\end{array} \right.\)
Vậy: …
b, `x^18:128=x^11`
`<=> x^18-128.x^11=0`
`<=> x^11.(x^7-128)=0`
`<=>` \(\left[ \begin{array}{l}x=0\\x=2\end{array} \right.\)
Vậy: …
c, `180-\frac{50:x+10}{3}=175`
`<=> 540-(50:x+10)=525`
`<=> 540-\frac{50+10x}{x}=525`
`<=> \frac{540x}{x}-\frac{50+10x}{x}=525`
`<=> \frac{540x-50-10x}{x}=525`
`<=> -50+530x=525x`
`<=> -50+530x-525x=0`
`<=> -50+5x=0`
`<=> 5x=50`
`<=> x=10`
Vậy: …