SAT 2 Two identical spheres of radius 6 intersect so that the distance between their center is 10.The points of intersection of the two spheres form a circle.What is the area of this circle?为什么在解 -2(x+5)
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SAT 2 Two identical spheres of radius 6 intersect so that the distance between their center is 10.The points of intersection of the two spheres form a circle.What is the area of this circle?为什么在解 -2(x+5)
SAT 2
Two identical spheres of radius 6 intersect so that the distance between their center is 10.The points of intersection of the two spheres form a circle.What is the area of this circle?
为什么在解 -2(x+5)
SAT 2 Two identical spheres of radius 6 intersect so that the distance between their center is 10.The points of intersection of the two spheres form a circle.What is the area of this circle?为什么在解 -2(x+5)
1.the area of the circle is 11pi.
2.可以拆开再移项.
3.√(x)is greater than or equal to 0,so √(x)=3.
第一个不等式怎么算答案都是大于负七的,你还是再算一次吧。第二个因为令a等于x的算数平方根,所以a的值是非负的。解出关于a的那个二次函数还需舍去负值。(满意请采纳)
尚友SAT论坛里有对SAT真题的详细讲解,你可以看看,加油~