\(x^{2018}+2x^{2017}+3x^{2016}+...+2017x+2018\)
\(=1+2+3+...+2017+2018\)
\(=\frac{2018.\left(2018+1\right)}{2}=2037171\)
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tim GTNN cua bieu thuc A=x-2017|x - 2017| + |x - 2018| + |x - 2019|
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|x-1| + |x-3| +|x-5| +|x-7| = 8
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Tinh gia tri cua bieu thuc sau:
\(C=x^{2010}-2015x^{2009}-2015x^{2018}-.....-2015x+1\)tai x=2016
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cho xyz la cac so thuc thoa man y+z+1/x=x+z+2/y=x+y+2/z=1/x+y+z tinh gia tri bieu thuc A=2016.x+y^2017+z^2017
cho đa thức f(x)=x^8 - 2017x^7 +2017x^6 - 2017x^5 +...+2017x^2 - 2017x + 2018.Tính f(2016)
Tính tổng:
x+2x+3x+4x+...+2017x=2016*2017