Tìm min của P = M.(x + 5)/√x + 3
cho A= x-8√x+8 / x-4 ; B= 2 /√x+2 + 1/ √x-2 (x ≥ 0 ;x khac 4 )
a, tinh A khi x=9
b, rut gon M=A+B
c, tim MIN cua P= M.(x+5) / √x+3
cho A = x+2 / x√x-1 + √x / x+√x+1 + 1 / 1-√x
B= √x-1 /2 (x≥0 ; x khac 1)
a, tinh A khi x= 1 / 2-√3 + 2-√3
b, rut gon A
c, rut gon p = A / B
d, cho x>1 tim MIN M = 1/ A
a, tinh A khi x=9
b, rut gon M=A+B
c, tim MIN cua P= M.(x+5) / √x+3
cho A = x+2 / x√x-1 + √x / x+√x+1 + 1 / 1-√x
B= √x-1 /2 (x≥0 ; x khac 1)
a, tinh A khi x= 1 / 2-√3 + 2-√3
b, rut gon A
c, rut gon p = A / B
d, cho x>1 tim MIN M = 1/ A