((4/9)^2*(-9/16)^1*(-1)^19)/((4/25)^2*(-25/144)^2*(-49/144)^2)

tính ((4/9)^2*(-9/16)^1*(-1)^19)/((4/25)^2*(-25/144)^2*(-49/144)^2) 

HELP ME!!!

\(\frac{\left(\frac{4}{9}\right)^2\cdot\left(\frac{-9}{16}\right)\cdot\left(-1\right)^{19}}{\left(\frac{4}{25}\right)^2\cdot\left(\frac{-25}{144}\right)^2\cdot\left(\frac{-49}{144}\right)^2}\)tính

2) . Viết thành dạng lũy thừa vơi số mũ lớn hơn 1 các số sau đây 1).8. 2).25 3).4 4).49 5).81 6).36 7).100 8).121 9).144 10).169 11).27 12).125 13).1000 14).32 15).243 16).343 17).216 18).64 19).225 20).128

Bài 2: Tính nhanh:

a) \(\dfrac{3}{4}\cdot\dfrac{8}{9}\cdot\dfrac{15}{16}\cdot\dfrac{24}{25}\cdot.....\cdot\dfrac{120}{121}\cdot\dfrac{143}{144}\)

b)\(\dfrac{5}{9}\cdot\dfrac{21}{25}\cdot\dfrac{45}{49}\cdot\dfrac{77}{81}\cdot.....\dfrac{357}{361}\cdot\dfrac{437}{441}\)

^{_{ai làm đúng mk dùng 3nick mk tick cho :))))}}

Tính a):\(\frac{\left(\frac{4}{9}\right)^2.\left(-\frac{9}{16}\right).\left(-1\right)^{19}}{\left(\frac{4}{25}\right)^2.\left(-\frac{25}{144}\right)^2.\left(-\frac{49}{144}\right)^2}\)

b)\(\frac{\left(\frac{2}{3}\right)^3.\left(-\frac{3}{4}\right)^2.\left(-1\right)^{2003}}{\left(\frac{2}{5}\right)^2.\left(-\frac{5}{12}\right)^3}\)

tính

a) \(\left(\frac{4}{9}\right)^2.\left(\frac{-9}{16}\right).\left(-1\right)^{19}\)/\(\left(\frac{4}{25}\right)^2.\left(\frac{-25}{144}\right)^2.\left(\frac{-49}{144}\right)^2\)                                                                                             b) \(\frac{10^4.81-16.15^2}{4^4.675}\)

1/2×(2×x-3)+105/2=-137/2 A,-12×25-25×75-25×13 B,-50/7×49/10-35/2×-10/7+ -25/3× -9/5 C,-354+265-156+125 D,-74+40-50+16-35 E,-2/3×4/5+-4/5×4/3-0,125

25-5*[4+x]=15

16-2*[15-x]=10

49-7*[13*x]=14

14*x-2*49=2*3*7