解答
21=bb10
解答
b=3321,b=−23321+23323i,b=−23321−23323i,b=6232cos(92π)+i6232sin(92π),b=6232cos(98π)+i6232sin(98π),b=6232cos(914π)+i6232sin(914π),b=6232cos(92π)−i6232sin(92π),b=6232cos(94π)+i6232sin(94π),b=6232cos(910π)+i6232sin(910π)
求解步骤
21=bb10
化简 bb10:b9
21=b9
在两边乘以 2
1=2b9
解 1=2b9:b=3321,b=−23321+23323i,b=−23321−23323i,b=6232cos(92π)+i6232sin(92π),b=6232cos(98π)+i6232sin(98π),b=6232cos(914π)+i6232sin(914π),b=6232cos(92π)−i6232sin(92π),b=6232cos(94π)+i6232sin(94π),b=6232cos(910π)+i6232sin(910π)
b=3321,b=−23321+23323i,b=−23321−23323i,b=6232cos(92π)+i6232sin(92π),b=6232cos(98π)+i6232sin(98π),b=6232cos(914π)+i6232sin(914π),b=6232cos(92π)−i6232sin(92π),b=6232cos(94π)+i6232sin(94π),b=6232cos(910π)+i6232sin(910π)
验证解
找到无定义的点(奇点):b=0
将不在定义域的点与解相综合:
b=3321,b=−23321+23323i,b=−23321−23323i,b=6232cos(92π)+i6232sin(92π),b=6232cos(98π)+i6232sin(98π),b=6232cos(914π)+i6232sin(914π),b=6232cos(92π)−i6232sin(92π),b=6232cos(94π)+i6232sin(94π),b=6232cos(910π)+i6232sin(910π)