后一个指数应该是2,不是5.
1.(x+5)^2-(x-5)^2=[(x+5)+(x-5)][(x+5)-(x-5)]=20x
2.(2-1)(2+1)(2^2+1)(2^4+1)(2^8+1)
=(2^2-1)(2^2+1)(2^4+1)(2^8+1)
=(2^4-1)(2^4+1)(2^8+1)
=(2^8-1)(2^8+1)
=2^16-1
后一个指数应该是2,不是5.
1.(x+5)^2-(x-5)^2=[(x+5)+(x-5)][(x+5)-(x-5)]=20x
2.(2-1)(2+1)(2^2+1)(2^4+1)(2^8+1)
=(2^2-1)(2^2+1)(2^4+1)(2^8+1)
=(2^4-1)(2^4+1)(2^8+1)
=(2^8-1)(2^8+1)
=2^16-1