观察下列各式:a+b=1.a2+b2=3,a3+b3=4,a4+b4=7,a5+b5=11,…,则a10+b1... 问题详情:观察下列各式:a+b=1.a2+b2=3,a3+b3=4,a4+b4=7,a5+b5=11,…,则a10+b10=( )A.28 B.76 C.123 ...