\(\left(-3\right)\cdot B=\left(-3\right)^1+\left(-3\right)^2+...+\left(-3\right)^{2016}\)
=>-4B=(-3)^2016-1
=>\(B=\dfrac{-3^{2016}+1}{4}\)
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Các câu hỏi tương tự
Cho A=\(\left(\dfrac{1}{2}-1\right).\left(\dfrac{1}{3}-1\right).\left(\dfrac{1}{4}-1\right)...\left(\dfrac{1}{2015}-1\right).\left(\dfrac{1}{2016}-1\right).\left(\dfrac{1}{2017}-1\right)\)
B=\(\left(-1\dfrac{1}{2}\right).\left(-1\dfrac{1}{3}\right).\left(-1\dfrac{1}{4}\right)...\left(-1\dfrac{1}{2015}\right).\left(-1\dfrac{1}{2016}\right).\left(-1\dfrac{1}{2017}\right)\)
Tính M=A.B
Bài 31 : Tính :
a) left(2^{-1}+3^{-1}right):left(2^{-1}-3^{-1}right)+left(2^{-1}.2^0right):2^3
b) left(-frac{1}{3}right)^{-1}-left(-frac{6}{7}right)^0+left(frac{1}{2}right)^2:2
c) text{[}left(0,1right)^2text{]}^0+text{[}left(frac{1}{7}right)^1text{]}^2.frac{1}{49}.text{[}left(2^3right)^3:2^5text{]}
Mong các cao nhân giúp ak , đang cần gấp
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Bài 31 : Tính :
a) \(\left(2^{-1}+3^{-1}\right):\left(2^{-1}-3^{-1}\right)+\left(2^{-1}.2^0\right):2^3\)
b) \(\left(-\frac{1}{3}\right)^{-1}-\left(-\frac{6}{7}\right)^0+\left(\frac{1}{2}\right)^2:2\)
c) \(\text{[}\left(0,1\right)^2\text{]}^0+\text{[}\left(\frac{1}{7}\right)^1\text{]}^2.\frac{1}{49}.\text{[}\left(2^3\right)^3:2^5\text{]}\)
Mong các cao nhân giúp ak , đang cần gấp
thục hiện phép thính \(B=\left(-5\right)^0+\left(-5\right)^1+\left(-5\right)^2+\left(-5\right)^3......+\left(-5\right)^{2016}+\left(-5\right)^{2017}\)
Tính
a, \(\left(\dfrac{1999}{2011}-\dfrac{2011}{1999}\right)-\left(\dfrac{-12}{1999}-\dfrac{12}{2011}\right)\)
b, \(\left(1-\dfrac{1}{2}\right).\left(1-\dfrac{1}{3}\right).\left(1-\dfrac{1}{4}\right).....\left(1-\dfrac{1}{2015}\right)\)
Cho 2 biểu thức:
Pleft(xright)1+x+2x^2+3x^3+...........+2014x^{2014}+2015x^{2015}
Qleft(xright)x^{2015}+x^{2014}+x^{2013}+..............+x^2+x+1
a) Tìm biểu thức Hleft(xright) sao cho Qleft(xright)Pleft(xright)-Hleft(xright)
b) So sánh: Pleft(frac{1}{2}right) với 3
Đọc tiếp
Cho 2 biểu thức:
\(P\left(x\right)=1+x+2x^2+3x^3+...........+2014x^{2014}+2015x^{2015}\)
\(Q\left(x\right)=x^{2015}+x^{2014}+x^{2013}+..............+x^2+x+1\)
a) Tìm biểu thức \(H\left(x\right)\) sao cho \(Q\left(x\right)=P\left(x\right)-H\left(x\right)\)
b) So sánh: \(P\left(\frac{1}{2}\right)\) với 3
Cho 2 biểu thức:
Pleft(xright)1+x+2x^2+3x^3+..............+2014x^{2014}+2015x^{2015}
Qleft(xright)x^{2015}+x^{2014}+x^{2013}+..................+x^2+x+1
a) Tìm biểu thức Hleft(xright) sao cho Qleft(xright)Pleft(xright)-Hleft(xright)
b) So sánh Pleft(frac{1}{2}right) với 3
Đọc tiếp
Cho 2 biểu thức:
\(P\left(x\right)=1+x+2x^2+3x^3+..............+2014x^{2014}+2015x^{2015}\)
\(Q\left(x\right)=x^{2015}+x^{2014}+x^{2013}+..................+x^2+x+1\)
a) Tìm biểu thức \(H\left(x\right)\) sao cho \(Q\left(x\right)=P\left(x\right)-H\left(x\right)\)
b) So sánh \(P\left(\frac{1}{2}\right)\) với 3
Bài 1:Tính
a)\(0,\left(3\right)+3\frac{1}{3}+0,\left(31\right)\)
b)\(\frac{4}{9}+1,2\left(31\right)-0,\left(13\right)\)
Bài 2:Tìm x biết
\(0,\left(37\right)\times x=1\)
a,left|3x-4right|+left|3y+5right|0 b,left|x+dfrac{19}{5}right|+left|y+dfrac{1890}{1975}right|+left|z-2004right|0 c,left|x+dfrac{9}{2}right|+left|y+dfrac{4}{3}right|+left|z+dfrac{7}{2}right|le0
d,left|x+dfrac{3}{4}right|+left|y-dfrac{1}{5}right|+left|x+y+zright|0 e,left|x+dfrac{3}{4}right|+left|y-dfrac{2}{5}right|+left|z+dfrac{1}{2}right|le0
Giups mình giải bài tìm x,y,z này nhé!!! Cảm ơn nhiều ạ!!!
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a,\(\left|3x-4\right|+\left|3y+5\right|=0\) b,\(\left|x+\dfrac{19}{5}\right|+\left|y+\dfrac{1890}{1975}\right|+\left|z-2004\right|=0\) c,\(\left|x+\dfrac{9}{2}\right|+\left|y+\dfrac{4}{3}\right|+\left|z+\dfrac{7}{2}\right|\le0\)
d,\(\left|x+\dfrac{3}{4}\right|+\left|y-\dfrac{1}{5}\right|+\left|x+y+z\right|=0\) e,\(\left|x+\dfrac{3}{4}\right|+\left|y-\dfrac{2}{5}\right|+\left|z+\dfrac{1}{2}\right|\le0\)
Giups mình giải bài tìm x,y,z này nhé!!! Cảm ơn nhiều ạ!!!
thực hiên phép tính :
a, left(3^2right)^2-left(2^3right)^2-left(-5^2right)^2
b, 2^3+3.left(-dfrac{1}{2}right)^0-left(dfrac{1}{2}right)^2.4+left(left(-2right)^2:dfrac{1}{2}right):8
c, left(4.2^5right):left(2^3.dfrac{1}{16}right)
d, Adfrac{2^{12}.3^5-4^6.9^2}{left(2^2.3right)^6+8^4.3^5}-dfrac{5^{10}.7^3-25^5.49^2}{left(125.7right)^3+5^9.14^3}
Đọc tiếp
thực hiên phép tính :
a, \(\left(3^2\right)^2-\left(2^3\right)^2-\left(-5^2\right)^2\)
b, \(2^3+3.\left(-\dfrac{1}{2}\right)^0-\left(\dfrac{1}{2}\right)^2.4+\left(\left(-2\right)^2:\dfrac{1}{2}\right):8\)
c, \(\left(4.2^5\right):\left(2^3.\dfrac{1}{16}\right)\)
d, \(A=\dfrac{2^{12}.3^5-4^6.9^2}{\left(2^2.3\right)^6+8^4.3^5}-\dfrac{5^{10}.7^3-25^5.49^2}{\left(125.7\right)^3+5^9.14^3}\)