\(\left(x-7\right)^{x+1}-\left(x-7\right)^{x+11}=0
\)
=> \(\left(x-7\right)^{x+1}=\left(x-7\right)^{x+11}\)
=> \(x+1=x+11\)
=> \(x+x=1+11\)
=> \(2x=12
\)
=> \(x=6\)
Vậy \(x=6\)
(x - 7)x+1 - (x - 7)x+11= 0
=>(x-7)x+1 = (x-7)x+11
=> x+1=x+11
=>1+11=x+x
=>12=2x
=>x=12:2
=>x=6
TÌM x biết: \(\left(x-7\right)^{x+1}-\left(x-7\right)x+11=0\)
Tìm x biết: \(\left(x-7\right)^{x+1}-\left(x-7\right)^{x+11}=0\)
Bài 3 : Tìm x, biết : \(\left(x-7\right)^{x+1}\) - \(\left(x-7\right)^{x+11}\) =0
Tìm x
a) \(\left|x-\dfrac{1}{3}\right|+\dfrac{4}{5}=\left|\left(-3,2\right)+\dfrac{2}{5}\right|\)
b) \(\left(x-7\right)^{x+1}-\left(x-7\right)^{x+11}=0\)
Tìm x biết:
\(\left(x-7\right)^{x+1}=\left(x-7\right)^{x+11}\)
tìm x biết
a, \(3\left(x-2\right)-4\left(2x+1\right)-5\left(2x+3\right)=50\)
b, \(\left(x-7\right)^5-\left(x-7\right)^3=0\)
a) Tìm tập hợp các số nguyên x, biết rằng\(4\dfrac{5}{9}:2\dfrac{5}{18}-7< x< \left(3\dfrac{1}{5}:3,2+4,5.1\dfrac{31}{45}\right):\left(-21\dfrac{1}{2}\right)\)
b) tìm x, biết \(\left|x+\dfrac{1}{2}\right|+\left|x+\dfrac{1}{6}\right|+\left|x+\dfrac{1}{12}\right|+\left|x+\dfrac{1}{20}\right|+....+\left|x+\dfrac{1}{110}\right|-11x\)
c)Tính gt biểu thức \(C=2x^3-5y^3+2015\) tại x,y thỏa mãn \(\left|x-1\right|+\left(y+2\right)^{20}=0\)
Tìm x, y biết :
\(\left(x+y-2\right)^2+7=\dfrac{14}{\left|y-1\right|+\left|y-3\right|}\)
tìm x biết :
\(\left|x-1\right|+2.\left|x-2\right|+3.\left|x-3\right|+4.\left|x-4\right|+5.\left|x-5\right|+20x=0\)