Question

已知等差数列{an}和{bn},若a1=1,b1=3,a2+b2=10,求a37+b37=?

Answer 1

a1=1,b1=3,

a2+b2=a1+b1+da+db=10;

da+db=6

a37+b37

=a1+b1+36(da+db)

=4+36*6

=220