1、:[(A+2B)的平方-(A-2B)的平方]÷(2AB)
=[(A+2B+A-2B)(A+2B-A+2B)]÷(2AB)=(2A×4B)÷(2AB)=4
2.X的2N次方=5
(2X的3N次方)的平方乘0.5(X的N次方)的平方
=4(x^2N)^3*0.5*(x^2N)
=2*5^3*5
=2*5^4
=1250
1、:[(A+2B)的平方-(A-2B)的平方]÷(2AB)
=[(A+2B+A-2B)(A+2B-A+2B)]÷(2AB)=(2A×4B)÷(2AB)=4
2.X的2N次方=5
(2X的3N次方)的平方乘0.5(X的N次方)的平方
=4(x^2N)^3*0.5*(x^2N)
=2*5^3*5
=2*5^4
=1250