Tính:

A = ( \(2^{17}\) + \(17^2\) ) . ( \(9^{15}\) - \(3^{15}\) ) . ( \(2^4\) -\(4^2\) ) 

B= \(\frac{2^{13}+2^5}{2^{10}+2^2}\)

C = \(\left(1^2+2^2+2^3+........+2020\right)^2.\left(65.111-13.15.37\right)\)

 D = \(\frac{1+2+3+.....+2020}{6+8+10+........+54}\)

E = \(\frac{25^{28}+25^{24}+25^{20}+.....+25^4+1}{25^{30}+25^{28}+25^{26}+.....+25^2+1}\)

A=\(\frac{1}{2}\)+\(\frac{1}{2^2}\)+\(\frac{1}{2^3}\)+....+\(\frac{1}{2^9}\)

B=\(\frac{1}{4}\)+\(\frac{1}{12}\)+\(\frac{1}{30}\)+....+\(\frac{1}{972}\)

C= 1+\(\frac{1}{2}\)(1+2)+\(\frac{1}{3}\)(1+2+3)+....+\(\frac{1}{20}\)(1+2+3+....+20)

 LÀM ƠN GIÚP MÌNH NHA ;^;

a) Tính giá trị của biểu thức A, B bằng cách hợp lí:

A = \(\frac{5}{6}\)- \(\frac{-1}{12}\)+ \(\frac{2}{3}\)- \(\frac{-2}{7}\)+ \(\frac{1}{25}\)- \(\frac{-1}{4}\)-\(\frac{5}{42}\);        B = \(\frac{7.6^{10}.2^{20}.3^6-2^{19}.6^{15}}{9.6^{19}.2^9-4.3^{17}.2^{26}}\)

b) Cho M = \(\frac{2}{7.19}\)+ \(\frac{6}{7.27}\)+ \(\frac{1}{4.9}\)+ \(\frac{7}{43.12}\)+ \(\frac{8}{17.43}\)và   N = \(\frac{9}{7.19}\)+ \(\frac{5}{7.33}\)+ \(\frac{7}{33.10}\)+ \(\frac{11}{10.51}\)

Tính tỉ số \(\frac{M}{N}\)?

c) Tìm số tự nhiên x, biết: \(2^x\)+ \(2^{x+1}\)+ \(2^{x+2}\)+.......+ \(2^{x+2015}\)= \(2^{2017}\)- 2

Làm giúp mk nhé!

a)tìm các số tự nhiên x biết lũy thừa 5\(^{2x-3}\)\(^{2x-3}\)thỏa mãn điều kiện 100<5\(^{2x-3}\)\(\le\)5\(^9\)\(^{2x-3}\)

b)1+2-3-4+5+6-7+8+...-499-500+501.

c)2\(^x\)+2\(^{x+1}\)=9\(^6\)

d)\(\frac{10.4^6.9^5.6^9.120}{8^4.3^{12}-6^{11}}\)

e)1+2+2\(^2\)+2\(^3\)+2\(^4\)+...+2\(^{49}\)+2\(^{50}\)

g)5+5\(^3\)+5\(^7\)+5\(^9\)+...+5\(^{47}\)+5\(^{49}\)

tìm x biết

a) \(\dfrac{2}{3}\): x - \(\dfrac{5}{6}\)= 1\(\dfrac{1}{2}\)

b) (\(\dfrac{5}{6}\) . x + \(\dfrac{2}{3}\)) : (\(\dfrac{2}{5}\) +\(1\dfrac{1}{3}\) )\(\dfrac{4}{9}\)

c) \(|\)x - \(\dfrac{4}{3}\)\(|\) - \(\dfrac{5}{6}\) = \(\dfrac{3}{5}\) . \(1\dfrac{1}{2}\)

d) \(|\)2x + \(\dfrac{1}{2}\)\(|\) - \(\dfrac{3}{4}\)=\(3\dfrac{1}{2}\)

e) \(|\dfrac{3}{2}\)x - \(\dfrac{5}{6}|\)+ \(\dfrac{12}{5}\)= \(1\dfrac{1}{2}\)