Question

which of the following term is not ap
a)1,4,7,10 b)-5,-2,1,4 c)3,7,12,18 d) 11,14,17​

Answer 1

Answer:

C is not an A.P.

(c)= 3,7,12,18

find common difference:-

D.( difference)=A4-A3=18-12=6

D.=A3-A2=12-7=5

D.=A2-A1=7-5=2

Common difference=(not equal )

Answer 2

Answer:

option c) is correct answer :-3,7,12,18

BECAUSE COMMON DIFFERENCE is not equal