Question

if -2 and 1 are first two terms of Ap, then 12th term is
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Answer 1

Step-by-step explanation:

t1 = -2 = a

t2 = 1

d = 1+2 = 3

t12 = (-2) + (11)(3)

= 31

Answer 2

Step-by-step explanation:

t1=-2, T2=1 ,D=t2-t1=1-(-2)=3

D=3

tn=a+(n-1)D

t12=-2+(12-1)3

=-2+(11)3

=-2+33

t12 =31

the 12th term is 31

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