làm ơn giúp mình ,bạn nào làm nhanh đúng mình chọn cho nhanh nha mọi người

nhanh nha mọi người

T.T

\(9^5.5^6:45^7=\frac{9^5.5^6}{\left(9.5\right)^7}\)

\(=\frac{9^5.5^6}{9^7.5^7}\)

\(=\frac{1}{9^2.5}=\frac{1}{405}\)

9⁵ . 5⁶ : 45⁷

= \(\frac{9^5.5^6}{9^7.5^7}\)

= \(\left(9\right)^{-2}.\left(5\right)^{-1}\)

= \(\frac{1}{81}.\frac{1}{5}\)

= \(\frac{1}{405}\)

a: \(=\dfrac{-3}{5}\cdot\dfrac{5}{7}+\dfrac{-3}{5}\cdot\dfrac{3}{7}+\dfrac{-3}{5}\cdot\dfrac{6}{7}\)

\(=\dfrac{-3}{5}\left(\dfrac{5}{7}+\dfrac{3}{7}+\dfrac{6}{7}\right)=\dfrac{-3}{5}\cdot2=-\dfrac{6}{5}\)

b: \(=\dfrac{3}{13}\cdot\dfrac{6}{11}+\dfrac{3}{13}\cdot\dfrac{5}{11}-\dfrac{2}{13}=\dfrac{3}{13}-\dfrac{2}{13}=\dfrac{1}{13}\)

c: =>1/2x+1+3/8=7/16

=>1/2x=-15/16

=>x=-15/8

d: =>5/2x-1/3=1/6*(-9)/2=-9/12=-3/4

=>5/2x=-3/4+1/3=-9/12+4/12=-5/12

=>x=-1/6

cau b là sao bn

7⁹¹:7⁸⁹+5.5²-124

=7⁹¹:7⁸⁹+5.25-124

=7^91-89+125-124

=7²+125-124

=49+125-124

=174-124

=50

4.15+28:7-6²⁰:6¹⁸

=60+4-6^20-18

=64-6²

=64-36

=28

(3²+2³):7

=(9+8):7

=17:7

=17/7

11²⁵:11²³-3⁵:(1¹⁰+2³)-60

=11²⁵:11²³-3⁵:(1+8)-60

=11²⁵:11²³-3⁵:9-60

=11²⁵:11²³-3⁵:3³-60

=11^25-23-3^5-3-60

=11²-3²-60

=121-9-60

=112-60

=52

giống của chị mày

=2700

=> 2700

Ta có: \(\frac{3^7\cdot2^5+3^8}{3^6\cdot5^2-3^6\cdot18}+\frac{2^5\cdot43+2^5}{2^5\cdot5^2-2^5\cdot3}\)

\(=\frac{3^7\left(2^5+3\right)}{3^6\left(5^2-18\right)}+\frac{2^5\left(43+1\right)}{2^5\left(25-3\right)}=\frac{3\cdot\left(32+3\right)}{25-18}+\frac{44}{22}\)

\(=\frac{3\cdot35}{7}+2=3\cdot5+2=15+2=17\)

\(A=\left(\dfrac{5.5^3}{125^2.49}\right)^{15}:\left(\dfrac{5^6}{434}\right)^7\)

\(=\left(\dfrac{5^4}{5^6.7^2}\right)^{15}.\dfrac{434^7}{5^{42}}\)

\(=\left(\dfrac{1}{5^2.7^2}\right)^{15}.\dfrac{434^7}{5^{42}}\)

\(=\dfrac{62^7.7^7}{5^{30}.7^{30}.5^{42}}\)

\(=\dfrac{62^7}{5^{72}.7^{23}}\)

Sao mình không thấy câu hỏi ?