作业帮(-1)^2-【1又3/7+(-12)÷6】^2×(-7/4）^3这题咋算?
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 14:56:30
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(-1)^2-【1又3/7+(-12)÷6】^2×(-7/4）^3这题咋算?
(-1)^2-【1又3/7+(-12)÷6】^2×(-7/4）^3这题咋算?
(-1)^2-【1又3/7+(-12)÷6】^2×(-7/4）^3这题咋算?
=1-(10/7-2)²×(-7/4)³
=1-(-4/7)²×(-7/4)²×(-7/4)
=1-[(-4/7)×(-7/4)]²×(-7/4)
=1-1×(-7/4)
=1+7/4
=2又3/4