52•32n+1•2n-3n•6n+2能被13整除吗?
(1)若x+y=7,求的值.
(2)若, ,求(x2a﹣b)2a+b的值.
(1)已知(9n) 2=320,求n的值.
(2)已知2·8n·16n=236,求n的值.
(3)已知8n=5,4m=7,求24m+6n的值.
计算
(1)(-a4b2) 3·(-a2b3) 2;
(2)(-xmyn) 2·(xm-1yn-1) 3.
(3)
计算:=________.
计算= ________________.