由 √√x =2,得 √x =4,所以 x=16
由 (y+4)³ = -64,得 y+4 = -4,y = -8
由 √(a+5) +(b-2)² =0,得 a+5 =0,b-2 =0,即 a = -5,b =2
所以
√(x-y+a^b)
= √(16+8+(-5)^2)
= √(12+25)
= √49
= 7
--------------------
梳理知识,帮助别人,愉悦自己.
“数理无限”团队欢迎你
由 √√x =2,得 √x =4,所以 x=16
由 (y+4)³ = -64,得 y+4 = -4,y = -8
由 √(a+5) +(b-2)² =0,得 a+5 =0,b-2 =0,即 a = -5,b =2
所以
√(x-y+a^b)
= √(16+8+(-5)^2)
= √(12+25)
= √49
= 7
--------------------
梳理知识,帮助别人,愉悦自己.
“数理无限”团队欢迎你