问题
解答题
①(π-3)0
②0.5-2
③(0.04)2003•[(-5)2003]2;
④(-2a)•a-(-2a)2
⑤[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷(4x)
⑥(x2n+1+xn+3-xn-1)÷(-xn-1)
答案
(1)原式=1;
(2)原式=4;
(3)原式=(0.04)2003•(25)2003=1;
(4)原式=-2a(a+2a)=-6a2;
(5)原式=(9x2-4y2-5x2-8xy+4y2)÷4x=x-2y;
(6)原式=-xn+2-x4+1.