10x3/8=
8x9+10x3:2+8
4^5x9^4 - 2x6^9 / 2^10x3^8+6^8x20
4^15/7^30 và 8^10x3^30/7^30x4^15
\(\frac{4^{15}}{7^{30}}=\frac{\left(2^2\right)^{15}}{7^{30}}=\frac{2^{30}}{7^{30}}=\left(\frac{2}{7}\right)^{30}\)
\(\frac{8^{10}.3^{30}}{7^{30}.4^{15}}=\frac{\left(2^3\right)^{10}.3^{30}}{7^{30}.\left(2^2\right)^{15}}=\frac{2^{30}.3^{30}}{7^{30}.2^{30}}=\frac{3^{30}}{7^{30}}=\left(\frac{3}{7}\right)^{30}\)
Vì \(\frac{2}{7}<\frac{3}{7}\Rightarrow\left(\frac{2}{7}\right)^{30}<\left(\frac{3}{7}\right)^{30}\)
Vậy \(\frac{4^{15}}{7^{30}}<\frac{8^{10}.3^{30}}{7^{30}.4^{15}}\).
so sanh
25^15 va 8^10x3^30
ta có:
25^15=(5^2)^15=5^30
8^10x3^30=(2^3)^10x3^30=2^30x3^30=(2x3)^30=6^30
vì 5>6 nên 5^30>6^30
vậy 25^15>8^10x3^30
so sánh 25^15 và 8^10
so sánh 4^15phần7^70và 8^10x3^30phần7^30x4^15
Rút gọn biểu thức
4^5x9^4-2x6^10/2^10x3^8-6^9x20
giúp mình gấp với
RÚT GỌN:
\(\frac{\text{4^5x9^4+2x6^9}}{\text{ }\text{2^10x3^8+6^8x20}}\)
=\(\frac{2^{10}.3^8+12.6^8}{2^{10}.3^8+20.6^8}=\frac{2^{10}.3^8+12.2^8.3^8}{2^{10}.3^8+20.2^8.3^8}\)
\(=\frac{2^8.3^8\left(2^2+12\right)}{2^8.3^8\left(2^2+20\right)}=\frac{16}{24}=\frac{2}{3}\)
các bn mau giúp mk với mk cg co bi gig bài nj
10x3+70
64-23+10x3