3(x-5)³=-375 2/1(x-3)³+19=-13 (³为立方)
问题描述:
3(x-5)³=-375 2/1(x-3)³+19=-13 (³为立方)
答
3(x-5)³=-375(x-5)³=-375/3(x-5)³=-125x-5= ³√(-125)x-5=-5x=02/1(x-3)³+19=-132/1(x-3)³=-13-192/1(x-3)³=-32(x-3)³=-64x-3= ³√(-64)x-3=-4x=-1