根号1又16/9+3次根号下-343-n次根号下(-5)^2n
问题描述:
根号1又16/9+3次根号下-343-n次根号下(-5)^2n
答
根号1又16/9+3次根号下-343-n次根号下(-5)^2n
=根号25/16+3次根号下(-7)^3-(-5)^(2n/n)
=5/4-7-25
=1.25-32
=-30.75