\(11B=11^2+11^3+...+11^{51}\)
\(\Leftrightarrow10B=11^{51}-11\)
hay \(B=\dfrac{11^{51}-11}{10}\)
\(11B=11^2+11^3+...+11^{51}\)
\(\Leftrightarrow10B=11^{51}-11\)
hay \(B=\dfrac{11^{51}-11}{10}\)
a ) 4 . 3^x-1 + 2 . 3^x+2 = 4 . 3^6 + 2 . 3^9
b ) 5^x+4 - 3 . 5^x+3 = 2 . 5^11
c ) 11 . 6^x-1 = 11 . 6^11 + 2 . 6^13
a,\(\frac{2}{3}-4.\left(\frac{1}{2}+\frac{3}{4}\right)\)
b,\(\left(\frac{-1}{3}+\frac{5}{6}\right).11-7\)
c,\(\left(\frac{-5}{9}\right).\frac{3}{11}+\left(\frac{-13}{18}\right).\frac{3}{11}\)
d,\(\left(\frac{-2}{3}\right).\frac{3}{11}+\left(\frac{-13}{18}\right).\frac{3}{11}\)
giúp mình với làm ơn
Tính hợp lí, tính nhanh( nếu có )
a)\(\dfrac{0,75-0,6+\dfrac{3}{7}+\dfrac{3}{13}}{2,75-2,2+\dfrac{11}{7}+\dfrac{11}{13}}\) c)\(-\left|1,5\right|.(1\dfrac{1}{3}-2)-\left|-\dfrac{2}{3}\right|\)
b)\(\dfrac{0,375-0,3+\dfrac{3}{11}+\dfrac{3}{12}\dfrac{ }{ }}{0.625-0,5+\dfrac{5}{11}+\dfrac{5}{12}}\) d)\([(\dfrac{2}{193}-\dfrac{3}{386}).\dfrac{193}{17}+\dfrac{33}{34}]:[(\dfrac{7}{2001}+\dfrac{11}{4002}.\dfrac{2001}{25}+\dfrac{9}{12}]\)
rút gọn biểu thức:
\(1,\frac{\left(5^4-5^3\right)^3}{125^4}\)
\(2,\frac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
các bạn giúp ình với! HELP ME!!!!!!!!!!
Tính:
5 - ( -5/11)^0 + ( 1/3 )^2 : 3
Rút gọn
a) \(\dfrac{2^{15}.9^4}{6^6.8^3}\)
b) \(\dfrac{45^{15}.5^{15}}{75^{15}}\)
c) \(\dfrac{8^{10}+4^{10}}{8^4+4^{11}}\)
d) \(\left(x^2\right)^5:\left(x^5\right)^2\)
(x-11+y)^2+(x-4-y)^2=0
bài 1: tính
a, 8^10 + 4^10/ 8^4 + 4^11
b, 10^3 +5 . 10^2 + 5^3
giúp mk với các bạn a
1) Thực hiện phép tính
a) \(\dfrac{4^6x9^5+6^9x120}{-8^4x3^{12}-6^{11}}\)
b) \(\dfrac{1}{1-\dfrac{1}{1-2-1}}+\dfrac{1}{1+\dfrac{1}{1+2-1}}\)
Cho A=1+2+22+23+........+210 So sánh A và 211