h

\(10\times\dfrac{3}{8}=5\times\dfrac{3}{4}=\dfrac{5\times3}{4}=\dfrac{15}{4}\)

= 5 x 3 / 4

= 15/4

\(\dfrac{15}{4}\)

\(\frac{4^{15}}{7^{30}}=\frac{\left(2^2\right)^{15}}{7^{30}}=\frac{2^{30}}{7^{30}}=\left(\frac{2}{7}\right)^{30}\)

\(\frac{8^{10}.3^{30}}{7^{30}.4^{15}}=\frac{\left(2^3\right)^{10}.3^{30}}{7^{30}.\left(2^2\right)^{15}}=\frac{2^{30}.3^{30}}{7^{30}.2^{30}}=\frac{3^{30}}{7^{30}}=\left(\frac{3}{7}\right)^{30}\)

Vì \(\frac{2}{7}<\frac{3}{7}\Rightarrow\left(\frac{2}{7}\right)^{30}<\left(\frac{3}{7}\right)^{30}\)

Vậy \(\frac{4^{15}}{7^{30}}<\frac{8^{10}.3^{30}}{7^{30}.4^{15}}\).

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

Các bạn làm nhanh hộ mình, mình đang cần gấp😊

=\(\frac{2^{10}.3^8+12.6^8}{2^{10}.3^8+20.6^8}=\frac{2^{10}.3^8+12.2^8.3^8}{2^{10}.3^8+20.2^8.3^8}\)

\(=\frac{2^8.3^8\left(2^2+12\right)}{2^8.3^8\left(2^2+20\right)}=\frac{16}{24}=\frac{2}{3}\)

các bn mau giúp mk với mk cg co bi gig bài nj