Question

Tinh gia tri cua phan so

\(\frac{2.4+2.4.8+4.8.16+8.16.32}{3.4+2.6.8+4.12.16+8.24.32}\)

Answer 1

Tí nữa có điện mình làm cho .-. 

Answer 2

ok bạn

Answer 3

2.4+2.4.8+ 4.8.16 + 8.16.32/ 3.4 + 2.6.8 + 4.12.16 + 8.24.32

= 2.4( 1+ 8+ 8.8 + 8.8.8) / 3.4(1+ 8 + 8.8 +8.8.8)

= 2.4/3.4

= 2/3

Answer 4

\(\frac{2\cdot4+2\cdot4\cdot8+4\cdot8\cdot16+8\cdot16\cdot32}{3\cdot4+2\cdot6\cdot8+4\cdot12\cdot16+8\cdot24\cdot32}\)

\(=\frac{2^3+2^6+2^9+2^{12}}{3\cdot2^2+3\cdot2^5+3\cdot2^8+3\cdot2^{11}}\)( Chỗ này bạn chịu khó tính các tích rồi tách thành thừa số nguyên tố )

\(=\frac{2\cdot2^2+2\cdot2^5+2\cdot2^8+2\cdot2^{11}}{3\cdot2^2+3\cdot2^5+3\cdot2^8+3\cdot2^{11}}\)

\(=\frac{2\left(2^2+2^5+2^8+2^{11}\right)}{3\left(2^2+2^5+2^8+2^{11}\right)}\)

\(=\frac{2}{3}\)