Question

(1)已知(x-1)的平方=4,求x的值.(2)已知/x/＜2π,x是整数,求x的值,并在数轴上表示求得的数.

Answer 1

(1)已知(x-1)的平方=4,求x的值.

x-1=2或-2

x=3或-1

(2)已知/x/＜2π,x是整数,求x的值,并在数轴上表示求得的数.

-2π＜x＜2π

x=-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6.