Question

000000000000 (1)

如.图.
0
0 0
0 0
(1)
0
0 0
0 0 0
0 0 0
0 0 0
(2)
0
0 0
0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
(3)
0
0 0
0 0
0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
0 0 0 0 0
(4)
图(1)用了5,.图(2)用了12..图(3)用了21..图(4)用了32..写出第(10)用了________

Answer 1

由图可知Sn=1+(n-1)*2+(n+1)^2
S(10)=1+9*2+11^2
=19+121=140