\(\dfrac{3^{6^{ }}.45^4-15^{13}.\dfrac{1}{5^3}}{27^4.25^3+45^6}\)

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5 tháng 8 2024

\(\dfrac{3^{14}.5^4.-3^{13}.5^{10}}{3^{12}.5^6+5^6.3^{12}}\)

=\(\dfrac{3^{13}.5^4.\left(3-5^6\right)}{3^{12}.5^6.\left(1+1\right)}\)

=\(\dfrac{3.\left(-15622\right)}{25.2}\)

=\(\dfrac{-23433}{25}\)

\(=\dfrac{3^6\cdot\left(3^2\right)^4\cdot5^4-5^{13}\cdot3^{13}\cdot5^{-9}}{3^{12}\cdot5^6+\left(3^2\right)^6\cdot5^6}\)

\(=\dfrac{3^{14}\cdot5^4-5^4\cdot3^{13}}{3^{12}\cdot5^6+3^{12}\cdot5^6}=\dfrac{3^{13}\cdot5^4\cdot2}{2\cdot3^{12}\cdot5^6}=\dfrac{3}{5^2}=\dfrac{3}{25}\)

5 tháng 8 2018

tử số=3^6.45^4-15^13.5^-9=3^6.(5.3^2)^4-(3.5)^13.5^-9=3^6.5^4.3^8-3^13.5^13.5^-9=3^14.5^4-3^13.5^4(3-1)=2.3^13.5^4

mẫu số=27^4.25^3+45^6=3^12.5^6+3^12.5^6=2.3^12.5^6

phân số =(2.3^13.5^4)/2.3^12.5^6=3/25

5 tháng 8 2018

Bạn trinh bày rõ hơn đibucminh

\(=\dfrac{3^{14}\cdot5^4-3^{13}\cdot5^4}{3^{12}\cdot5^6+3^{12}\cdot5^6}\)

\(=\dfrac{3^{13}\cdot5^4\cdot\left(3-1\right)}{2\cdot3^{12}\cdot5^6}=\dfrac{9}{25}\)

\(=\dfrac{3^6\cdot3^{10}\cdot5^5-3^{13}\cdot5^{13}:5^9}{3^{12}\cdot5^6+5^6\cdot3^{12}}=\dfrac{3^{16}\cdot5^5-3^{13}\cdot5^4}{3^{12}\cdot5^6\cdot2}\)

\(=\dfrac{5^4\cdot3^{13}\left(3^3\cdot5-1\right)}{3^{12}\cdot5^6\cdot2}=\dfrac{3}{25}\cdot\dfrac{134}{2}=\dfrac{3}{25}\cdot67=\dfrac{201}{25}\)

\(=\dfrac{3^6\cdot3^8\cdot5^4-3^{13}\cdot5^{13}:5^9}{3^{12}\cdot5^6+3^{12}\cdot5^6}\)

\(=\dfrac{3^{14}\cdot5^4-3^{13}\cdot5^4}{3^{12}\cdot5^6\cdot2}=\dfrac{3^{13}\cdot5^4\cdot\left(3-1\right)}{3^{12}\cdot5^6\cdot2}=\dfrac{3}{25}\)

314.54-313.54/312.56+312.56

=313.54.(3-1)/2.312.56

=3.2/2.52

=3/52

=3/25

\(\dfrac{3^0\cdot45^4-15^3\cdot5^{-9}}{27^4\cdot25^3+45^6}\) bạn ơi số to

5 tháng 11 2017

\(=\dfrac{3^6.\left(3^2.5\right)^4-\left(5.3\right)^3.5^{-9}}{\left(3^3\right)^4.\left(5^2\right)^3+\left(3^2.5\right)^6}\\ =\dfrac{3^6.3^8.5^4-3^3.5^3.5^{-9}}{3^{12}.5^6+3^{12}.5^6}\\ =\dfrac{3^{14}.5^4-3^3.5^{-6}}{3^{12}.5^6+3^{12}.5^6}\\ =\dfrac{3^3.5^{-6}\left(3^{11}.5^{10}-1\right)}{3^{12}.5^6\left(1+1\right)}\)Hiện mình chỉ làm được đến đây! Để mình suy nghĩ rồi giải tiếp nhé! Chúc bạn học giỏi!!!vui

5 tháng 11 2017

cảm ơn nhiều nha

Bài 1: 

a: \(\dfrac{45^{10}\cdot5^{20}}{75^{15}}=\dfrac{5^{10}\cdot3^{20}\cdot5^{20}}{\left(5^2\right)^{15}\cdot3^{15}}=3^5\)

b: \(\dfrac{2^{15}\cdot9^4}{6^6\cdot8^3}=\dfrac{2^{15}\cdot3^8}{2^6\cdot2^9\cdot3^6}=3^2\)