Answer:
Step-by-step explanation:
An = -2+(n-1)3
An=-5+3n
soln,
here first term(a)= -2
second term (t2) = 1
common difference (d) = t2 - a
= 1 +2 = 3
now,
nth term = a + (n-1)d
= -2 + ( n - 1) 3
= -2 + 3n - 3
= 3n - 5
D
19*40= 760
coefficient..........