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\(\frac{2^{76}-2^{74}}{2^{78}-2^{76}}=\frac{2^{74}\left(2^2-1\right)}{2^{76}\left(2^2-1\right)}=\frac{1}{2^2}=\frac{1}{4}\)
d) Ta có: \(\dfrac{2^{76}-2^{74}}{2^{78}-2^{76}}\)
\(=\dfrac{2^{74}\left(2^2-1\right)}{2^{76}\left(2^2-1\right)}=\dfrac{2^{74}}{2^{76}}\)
\(=\dfrac{1}{2^2}=\dfrac{1}{4}\)
276 - 274/278 - 276
= 274 . ( 22 - 1)/276 . ( 22 - 1)
= 274/276
= 1/22 = 1/4
2^76-2^74/2^78-2^76
=2^76-(2^2)^37/(2^2)^38-2^76
=(2^2)^37/(2^2)^38=1/4
tick cho mk nha bạn
\(\frac{2^{76}-2^{74}}{2^{78}-2^{76}}=\frac{2^{74}\left(2^2-1\right)}{2^{76}\left(2^2-1\right)}=\frac{2^{74}}{2^{76}}=\frac{1}{2^2}=\frac{1}{4}.\)
học tốt ~~~
\(\left(1+\frac{1}{11}\right)\left(1+\frac{1}{12}\right)...\left(1+\frac{1}{16}\right)\)
\(=\frac{12.13.14....17}{11.12.13....16}=\frac{17}{11}\)
A = 76 - |x - 78| - |78 - x|
A = 76 - 2.|x - 78|
A = 76 - 2.(x - 78)
A = 76 - 2x + 156
A = 232 - 2x
Chắc thế
\(\frac{37.7+37.3}{74.25-74.10}=\frac{37.\left(7+3\right)}{74.\left(25-10\right)}=\frac{37.10}{37.2.15}=\frac{10}{30}=\frac{1}{3}\)
\(\frac{2^{76}-2^{74}}{2^{78}-2^{76}}=\frac{2^{74}.2^2-2^{74}}{2^{76}.2^2-2^{76}}=\frac{2^{74}.\left(2^2-1\right)}{2^{76}.\left(2^2-1\right)}=\frac{2^{74}}{2^{74}.2^2}=\frac{1}{2^2}=\frac{1}{4}\)
\(\dfrac{2^{76}-2^{74}}{2^{78}-2^{76}}=\dfrac{2^{74}\left(2^2-1\right)}{2^{76}\left(2^2-1\right)}=\dfrac{1}{2^2}=\dfrac{1}{4}\)