1.已知,x+y=-6,x-y=5 A.(x+y)²=-36 B.(y-x)²=-10 C.xy=2.75 D.x²-y²=25 我知道2(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1=?求解,要有过程,会加分的哦!我才上初中
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![1.已知,x+y=-6,x-y=5 A.(x+y)²=-36 B.(y-x)²=-10 C.xy=2.75 D.x²-y²=25 我知道2(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1=?求解,要有过程,会加分的哦!我才上初中](/uploads/image/z/218449-1-9.jpg?t=1.%E5%B7%B2%E7%9F%A5%2Cx%2By%3D-6%2Cx-y%3D5+A.%EF%BC%88x%2By%EF%BC%89%26sup2%3B%3D-36+B.%EF%BC%88y-x%EF%BC%89%26sup2%3B%3D-10+C.xy%3D2.75+D.x%26sup2%3B-y%26sup2%3B%3D25+%E6%88%91%E7%9F%A5%E9%81%932%EF%BC%883%2B1%EF%BC%89%EF%BC%883%5E2%2B1%EF%BC%89%EF%BC%883%5E4%2B1%EF%BC%89%EF%BC%883%5E8%2B1%EF%BC%89%EF%BC%883%5E16%2B1%EF%BC%89%EF%BC%883%5E32%2B1%EF%BC%89%2B1%3D%3F%E6%B1%82%E8%A7%A3%2C%E8%A6%81%E6%9C%89%E8%BF%87%E7%A8%8B%2C%E4%BC%9A%E5%8A%A0%E5%88%86%E7%9A%84%E5%93%A6%21%E6%88%91%E6%89%8D%E4%B8%8A%E5%88%9D%E4%B8%AD)
1.已知,x+y=-6,x-y=5 A.(x+y)²=-36 B.(y-x)²=-10 C.xy=2.75 D.x²-y²=25 我知道2(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1=?求解,要有过程,会加分的哦!我才上初中
1.已知,x+y=-6,x-y=5 A.(x+y)²=-36 B.(y-x)²=-10 C.xy=2.75 D.x²-y²=25 我知道
2(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1=?
求解,要有过程,会加分的哦!
我才上初中
1.已知,x+y=-6,x-y=5 A.(x+y)²=-36 B.(y-x)²=-10 C.xy=2.75 D.x²-y²=25 我知道2(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1=?求解,要有过程,会加分的哦!我才上初中
1.(x+y)²=(-6)^2=36
(y-x)²=(-5)^2=25
xy=[(x+y)^2-(x-Y)^2]/4=(36-25)/4=2.75
x²-y²=(x+y)(x-Y)=-6*5=-30
所以选C
2.原式=(3-1)(3+1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1
=(3^2-1)(3^2+1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1
=(3^4-1)(3^4+1)(3^8+1)(3^16+1)(3^32+1)+1
以此类推.
=3^64-1+1
=3^64
高中 数学 麻烦 双曲线 弧线 好好学嘛
圆
列出一个方程组 解一下x y
选c