1+3+5+7+…+199/2+1+6+8+…+200等於多少

1+3+5+7+…+199/2+1+6+8+…+200等於多少

1+3+5+7+…+199/2+4+6+8+…+200
=(1+199)x100÷2/(2+200)x100÷2
=200/202
=100/101