设二阶线性非齐次方程<img src=https://huaweicloudobs.ahjxjy.cn/BF80E75DC88661040CEB417E72A89625.png title=QQ图片20160224221516.png alt=QQ图片20160224221516.png/>有三个特解<img src=https://huaweicloudobs.ahjxjy.cn/30ADB8C932A284BCD6D6FD43634CD976.png title=QQ图片20160224222755.png alt=QQ图片20160224222755.png/>,则则其通解为( )
①
<img src=https://huaweicloudobs.ahjxjy.cn/79BDF54DD0737592B3A67EA72A440242.png title=QQ图片20160224222917.png alt=QQ图片20160224222917.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/2805ACB453C0781F902D9FA252A1D5FD.png title=QQ图片20160224222932.png alt=QQ图片20160224222932.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/B6BB60DE9AB98BB12B14907339048EC1.png title=QQ图片20160224222949.png alt=QQ图片20160224222949.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/33E1A495886946BD8344FAA0C92C665A.png title=QQ图片20160224223005.png alt=QQ图片20160224223005.png/>