Question

a)14.7^10-10.7^10 phần 7^10

b)5^60.30^5 phần 15^5.5^61

c)4^32.5^25 phần 25^10.16^8

d)12.3^10+3^11 phần 3^10 

Em cần gấp ạ!

Câu hỏi lần trước em sai đề bài mong mn cho em xinloi ạ

Answer 1

a: \(\dfrac{14\cdot7^{10}-10\cdot7^{10}}{7^{10}}=\dfrac{7^{10}\left(14-10\right)}{7^{10}}=14-10=4\)

b: \(\dfrac{5^{60}\cdot30^5}{15^5\cdot5^{61}}=\dfrac{5^{60}}{5^{61}}\cdot\dfrac{30^5}{15^5}=\dfrac{2^5}{5}=\dfrac{32}{5}\)

c: \(\dfrac{4^{32}\cdot5^{25}}{25^{10}\cdot16^8}=\dfrac{\left(2^2\right)^{32}\cdot5^{25}}{\left(5^2\right)^{10}\cdot\left(2^4\right)^8}=\dfrac{2^{64}}{2^{32}}\cdot\dfrac{5^{25}}{5^{20}}\)

\(=2^{32}\cdot5\)

d: \(\dfrac{12\cdot3^{10}+3^{11}}{3^{10}}=12\cdot\dfrac{3^{10}}{3^{10}}+\dfrac{3^{11}}{3^{10}}\)

=12+3=15