如果关于x的多项式 x4+(a-1)x3+5x2-(b+3)x-1不含x3项和x项,求a、b的值.
解:∵关于x的多项式x4+(a-1)x3+5x2-(b+3)x-1不含x3项和x项,∴a-1=0,b+3=0,∴a=1,b=-3.故a的值为1,b的值为-3.
-- It's difficult for the village children to cross the river for school.
-- I think a bridge ________ over the river.
已知对于任意实数a(a>0,且a≠1),函数f(x)=7+ax﹣1的图象恒过点P,则P点的坐标是( )