0,15,−26,37,−48,......find the nth term of the sequence
A.(-1)n n/(n+4)
B.(-1)n( n-1)/(n+3)
C.(-1)n-1( n-1)/(n+2)
D.(-1)n+1( n)/(n+3)
"B" is the correct answer......do you see why??