1.Y=F(X)的定义域为(0,+∝),且对于定义域内的任意X,Y都有F(X,Y)=F(X)+F(Y),且F(2)=1,则F(√2/2)的值为多少?A.1 B.1/2 C.-2 D.-1/22.两个不同的函数F(x)=x^2+ax+1与g(x)=x^2+x+a(a为常数)的定义域都是R,它们的值域
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![1.Y=F(X)的定义域为(0,+∝),且对于定义域内的任意X,Y都有F(X,Y)=F(X)+F(Y),且F(2)=1,则F(√2/2)的值为多少?A.1 B.1/2 C.-2 D.-1/22.两个不同的函数F(x)=x^2+ax+1与g(x)=x^2+x+a(a为常数)的定义域都是R,它们的值域](/uploads/image/z/7807912-16-2.jpg?t=1.Y%3DF%28X%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E4%B8%BA%EF%BC%880%2C%2B%E2%88%9D%EF%BC%89%2C%E4%B8%94%E5%AF%B9%E4%BA%8E%E5%AE%9A%E4%B9%89%E5%9F%9F%E5%86%85%E7%9A%84%E4%BB%BB%E6%84%8FX%2CY%E9%83%BD%E6%9C%89F%28X%2CY%29%3DF%28X%29%2BF%28Y%29%2C%E4%B8%94F%282%29%3D1%2C%E5%88%99F%28%E2%88%9A2%2F2%29%E7%9A%84%E5%80%BC%E4%B8%BA%E5%A4%9A%E5%B0%91%3FA.1+B.1%2F2+C.-2+D.-1%2F22.%E4%B8%A4%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E5%87%BD%E6%95%B0F%28x%29%3Dx%5E2%2Bax%2B1%E4%B8%8Eg%28x%29%3Dx%5E2%2Bx%2Ba%28a%E4%B8%BA%E5%B8%B8%E6%95%B0%29%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E9%83%BD%E6%98%AFR%2C%E5%AE%83%E4%BB%AC%E7%9A%84%E5%80%BC%E5%9F%9F)
1.Y=F(X)的定义域为(0,+∝),且对于定义域内的任意X,Y都有F(X,Y)=F(X)+F(Y),且F(2)=1,则F(√2/2)的值为多少?A.1 B.1/2 C.-2 D.-1/22.两个不同的函数F(x)=x^2+ax+1与g(x)=x^2+x+a(a为常数)的定义域都是R,它们的值域
1.Y=F(X)的定义域为(0,+∝),且对于定义域内的任意X,Y都有F(X,Y)=F(X)+F(Y),且F(2)=1,则F(√2/2)的值为多少?
A.1 B.1/2 C.-2 D.-1/2
2.两个不同的函数F(x)=x^2+ax+1与g(x)=x^2+x+a(a为常数)的定义域都是R,它们的值域也一样,则a=?
3.已知F(X)的图像过三点:(0,1)、(1,2)、(2,4),写出两种不同类型的函数解析式
4.F(X)是一次函数,且满足3F(3X+1)-2F(X-1)=2X+17,求 F(X)
1.Y=F(X)的定义域为(0,+∝),且对于定义域内的任意X,Y都有F(X,Y)=F(X)+F(Y),且F(2)=1,则F(√2/2)的值为多少?A.1 B.1/2 C.-2 D.-1/22.两个不同的函数F(x)=x^2+ax+1与g(x)=x^2+x+a(a为常数)的定义域都是R,它们的值域
1 F(√2/2)+F(√2/2)=F(2)=1
b 1/2
2\ F(x)=x^2+ax+1=(x+a/2)^2+1-a^2/4>=1-a^2/4
g(x)=x^2+x+a=(x+1/2)^2+a-1/4>=a-1/4
1-a^2/4=a-1/4
a^2+4a-5=0
a=-5;a=1
3\:(0,1)、(1,2)、(2,4),
y=2^x
y=x+1
y=x^2*4/2+x*1/2+1
4\F(X)=ax+b
3F(3X+1)-2F(X-1)=2X+17
==3a(3x+1)+3b-2a(x-1)-2b=2x+17
9ax+3a+3b-2ax+2a-2b=2x+17
7ax+(5a+b)=2x+17
7a=2,5a+b=17
F(X)=2/7*x+109/7