1) tim 5 gia tri cua x
a) 4.(x-3)<0
b) -2.(x+1)<0
Mong cac ban giup do!!!! giup mik clik cho
tim gia tri cua x biet 1/4*1/5*x=1/2
gia tri cua x la
bai1 :P=x+2/x+3-5/(x+3)(x-2)+1/2-x
a,Tim dkxd cua P
b,Rut gon bieu thuc P
c,tim x de P=-3/4
d,tim gia tri nguyen cua x de P cung co gia tri nguyen
e,tinh gia tri bieu thuc P khi x^2-9=0
tim x 5/8 nhan gia tri tuyet cua x-2/3=-1/4
Bai 5
a)Tim gia tri lon nhat cua A=2016 phan (x-2)2 +(x-y)4+3
b)Tim cac gia tri cua x sao cho A=7-x phan x+2 co gia tri duong
tim cac gia tri cua x de bieu thuc 3/4*x-1>1/2*x+5
bai 1
a = (3x / 2x + 4 ) + (x +3 /x ^ 2 - 4 )
a . tim x de gia tri phan thuc a duoc xac dinh
b. rut gon a
c. tinh gia trin cua a khi x bang -3
d . tim gia tri cua x de phan thuc co gia tri bang 2
bai 1
a = (3x / 2x + 4 ) + (x +3 /x ^ 2 - 4 )
a . tim x de gia tri phan thuc a duoc xac dinh
b. rut gon a
c. tinh gia trin cua a khi x bang -3
d . tim gia tri cua x de phan thuc co gia tri bang 2
a: ĐKXĐ: x<>2; x<>-2
b: \(A=\dfrac{3x\left(x-2\right)+2x+6}{2\left(x-2\right)\left(x+2\right)}=\dfrac{3x^2-6x+2x+6}{2\left(x-2\right)\left(x+2\right)}\)
\(=\dfrac{3x^2+4x+6}{2\left(x-2\right)\left(x+2\right)}\)
c: Khi x=-3 thì \(A=\dfrac{3\cdot\left(-3\right)^2-4\cdot3+6}{2\left(-3-2\right)\left(-3+2\right)}=\dfrac{21}{10}\)
tim x
gia tri tuyet doi cua -x+5=gia tri tuyet doi cua 1-5
/ -x + 5 / = / 1- 5 /
\(\Rightarrow-x+5=1-5\)
\(\Rightarrow-x+5=-4\)
\(\Rightarrow-x=-9\)
\(\Rightarrow x=9\)
/ -x + 5 / = / 1 - 5 /
=> -x + 5 = 1 - 5
=> -x + 5 = -4
=> -x = -9
=> x = 9
tim gia tri nho nhat cua bieu thuc tim gia tri nho nhat cua bieu thuc x^4-4x^3+12x^2-16x+16
tim gia tri nho nhat cua (x+1)(x+2)(x+4)(x+5)