check whether - 150 is a
AR 11,8, 5,2
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Answer:
a=11
d=8-11
= -3
An= -150
An=a+(n-1) d
-150= 11+(n-1) -3
-150-11= -3n+3
-161= -3n+3
-161-3= -3n
-164= -3n
-164/-3= n
since -164 is not divisible by 3
therefore -150 is not a term of given AP
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