Ta có: \(\dfrac{11}{2}:2x=-\dfrac{5}{2}:\dfrac{2}{3}\)
=>\(\dfrac{11}{2}:2x=-\dfrac{5}{2}\cdot\dfrac{3}{2}=-\dfrac{15}{4}\)
=>\(2x=-\dfrac{11}{2}:\dfrac{15}{4}=-\dfrac{11}{2}\cdot\dfrac{4}{15}=\dfrac{-22}{15}\)
=>\(x=-\dfrac{22}{15}:2=-\dfrac{11}{15}\)
cho 2 da thuc :f(x)=3x^3 - 2x^2 + x + 5
g(x)=3x^2 + ax + b
tim a,b sao cho f(x)=(x-1)*g(x)
moi nguoi giai giup em voi
tim nghiem cua cac da thuc
a,x^2+x
b,x^2+2x+1
c,2x^2+3x-5
d,x^2-4x+3
e,x^2+6x+5
f,3x(12x-4)-9x(4x-3)=30
g,2x(x-1)+x(5-2x)=15
tim da thuc f(x) roi tim nghiem cua f(x) biet rang:x^3+2x^2(4y-1)-4xy^2-9y^3-f(x)=-5x^3+8x^2y-4xy^2-9y^3
tim GTNN hoac GTLN
F=(x2- 2x)2-5
G= /2x -1/+/y-3/+5
I= /3+4x/-1
cho f(x) = 2x^2+ax+4
g(x) = x^2-5x-b
tim a , b biet f(1)=g(2) ; f(-1)=g(5)
Tim x:
a) 2x-3=1/2
b) /x+1/=0.25
c) 32/2x=2
d) 64/125=(4/5)^x
e) x/6=-9/18
f) -4/x+3=12/-15
g) x+1/2/0.75=3/2/0.25
cho da thuc :
F{x} = -2x +x^3 +3x +1
G{x} = x+x^3+1
H{x}= 2x^2 -1
a. tim x sao cho :F{x} - G {x} +H{x} = 5
1)tim x bit a)(1/2-1/3).6^x+6^x+2=6^15+6^18
b)3^x+3^x+2=2430
c)(2x-15)^5=(2x-15)^3
2) so saanh
a)2^11 va 5^35
b)2^31 va 3^21
c)2^15 va 27^5.49^8 d)21^15 va 27^5.49^8
Tim giá trị nhỏ nhất của các biểu thức sau: a A=|2x-1|-5
B B=x^2+3|y-2|-1
C C=(2X^2+1)^4-3
D d=|x1/2|+(y+2)^2+11
cho cac da thuc F(x) = 4x^2 + 3x - 2
G(x) = 3x^2 - 2x + 5 H(x) = x(5x-2) +3
a) tim x de F(x) + G(x) - H(x) = 0
b) chung to F(x) - 3x + 5 luon duong voi moi x
