A\(=4^5+5.4^4-5.4^3-5.4^2+5.4-1\)
\(=1024+1280-320-80+20-1\)\(=1923\)
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cho x-y=3.tinh gia tri bieu thuc A=x(2x+4y-4)+2y(y-5x+2)+2xy
cho bieu thuc : M ( x phan x^2 -25 - x-5 phan x^2 +5x ) : 2x-5 phan 5x - x^2
a) rut gon M
b) tinh gia tri cua M voi x = -2010
c) tim tat ca cac gia tri nguyen cua x de M co gia tri nguyen.
Ai giup m voi: Thu gon roi tinh bieu thuc sau:
C= x^5 - 5x^4 + 5x^3 - 5x^2 + 5x -1 voi x=4
Tim x sao cho gia tri bieu thuc 2-5x nho hon gia tri bieu thuc 3(2-x)
1) Tinh gia tri bieu thuc:
C= \(\frac{5x^2+3y^2}{10x^2-3y^2}\)voi \(\frac{x}{3}=\frac{y}{5}\)
giup to hai bai nay
1. gia tri X thoa man 4x*(5x-1)+10x*(2-2x)=16
gia tri x thoa man (x^2+1)*(x^2+5)
2. tinh gia tri bieu thuc A
A=(202+182+162+...+42+22)-(192+172+152+...+32+12)
Tim gia tri nho nhat cua cac bieu thuc sau
a) A=|5x+2|+2015
b) B=2016-|4-3x|
c) C=|x-4|+|x-3|
giup minh giai cac gia tri nay voi...dung minh se tich
HỨA SẼ TÍCH...
tinh gia tri bieu thuc biet 12x^2+20x+1. biet 3x^2+5x-2=0. mn lam jup nhe
1.cho phan thuc P=\(\frac{5x-4y}{5x+4y}\)voi 25x2+16y2=50xy.khi do gia tri cua bieu thuc P=\(\frac{1+P^2}{1-P^2}\)la
2.gia tri lon nhat cua bieu thuc B=\(\frac{14}{\frac{x^2}{4}-3x+16}la\)
3.gia tri cua a de da thuc A=2x3+7x2+ax+3 chia het cho B=(x+1)2la a=?