函数y=3x²+2x+k有最小值-4/3,则k的值为

函数y=3x²+2x+k有最小值-4/3,则k的值为
函数y=3x²+2x+k有最小值-4/3,则k的值为

函数y=3x²+2x+k有最小值-4/3,则k的值为
y=3(x²+2x/3+1/9)-1/3+k
=3(x+1/3)²-1/3+k最小值=-1/3+k=-4/3
k=-1

1/(2√x)dx
=1/2*x^(-1/2)dx
=d[1/2*x^(-1/2+1)/(-1/2+1)]
=d1/2*√x*2)
=d(√x)原式=(x²-2x+1)-y²
=(x-1)²-y²
=(x+y-1)(x-y-1)
原式=(x²+3x+2x+2)(x²+3x-2x-2)
=(x²+5x+2)(x²+x-2)
=(x²+5x+2)(x+2)(x-1)