`(4/5)^(2x +7)= 625/256`
`=> ` `(4/5)^(2x +7)= (5/4)^4`
`=>` `(4/5)^(2x +7)= (4/5)^(-4)`
`=> 2x + 7 =-4`
`=> x =-11/2`
`(4/5)^(2x +7)= 625/256`
`=> ` `(4/5)^(2x +7)= (5/4)^4`
`=>` `(4/5)^(2x +7)= (4/5)^(-4)`
`=> 2x + 7 =-4`
`=> x =-11/2`
Tìm x biết (4/5) 2x+7 = 625/ 256
tìm x biết : \(\left(\frac{4}{5}\right)^{2x+7}=\frac{625}{256}\)
Tìm X biết :\(\left(\frac{4}{5}\right)^{2x+7}=\frac{625}{256}\)
tìm x
\(\left(\frac{4}{5}\right)^{2x+7}=\frac{256}{625}\)
Tìm x biết :
\(\left(\frac{4}{5}\right)^{2x+7}=\frac{625}{256}\)
Tìm x, biết:
a) \(\left(\frac{4}{5}\right)^{2x+7}=\frac{625}{256}\)
b) \(\frac{7^{x+2}+7^{x+1}+7^x}{57}=\frac{5^x+5^{2x+1}+5^{2x+2}}{132}\)
\(\left(x-\dfrac{2}{15}\right)^3=\dfrac{8}{125};\left(\dfrac{4}{5}\right)^{2x+5}=\dfrac{256}{625}\)
bài 1 tìm x
\(\frac{4^{2x+7}}{5}=\frac{625}{256}\)
mọi người giái giúp mk nha
(4/5)^2x+6=256/625
các bạn hãy tìm x
nếu đúng sẽ tick
\(\left(\frac{4}{5}\right)^{2x}+6=\frac{256}{625}\). Tìm x?