# whch one of the following is not an AP:(A)13,8,3,-2,-7,-12(B) 10.8,11.2,11.6,12,12.4(C) 81/7,18 2/7,28 3/7,48 4/7,58 5/7(D) 8 3/23,11 6/23,14 9/23,17 12/23

i think option B is the right answer

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u have to say the reason ?????

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(A) T2-T1=8-13=-5 T3-T2=3-8=-5 T4-T3=-2-3=-5 T5-T4=-7-(-2)=-5 T6-T5=-12-(-7)=-5 , it is an AP

(B) T2-T1=11.2-10.8=0.4 T3-T2=11.6-11.2=0.4 T4-T3=12-11.6=0.4 T5-T4=12.4-12=0.4 , it is an AP

(C)T2-T1=10.14.. T3-T2=10.14.. T4-T3= 20.14.. T5-T4=10.14.. , it is not an AP

(D) T2-T1= 3.13.. T3-T2= 3.13.. T4-T3= 3.13.. , it is an AP

therefore the correct answer is (C) 8 1/7,18 2/7,28 3/7,48 4/7,58 5/7

THUMBSS UPPLZZZ!!!!! :D

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(A) T2-T1=8-13=-5 T3-T2=3-8=-5 T4-T3=-2-3=-5 T5-T4=-7-(-2)=-5 T6-T5=-12-(-7)=-5 , it is an AP

(B) T2-T1=11.2-10.8=0.4 T3-T2=11.6-11.2=0.4 T4-T3=12-11.6=0.4 T5-T4=12.4-12=0.4 , it is an AP

(C)T2-T1=10.14.. T3-T2=10.14.. T4-T3= 20.14.. T5-T4=10.14.. , it is not an AP

(D) T2-T1= 3.13.. T3-T2= 3.13.. T4-T3= 3.13.. , it is an AP

therefore the correct answer is (C) 8 1/7,18 2/7,28 3/7,48 4/7,58 5/7

THUMBSS UPPLZZZ!!!!! :D

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AP a 13 8 3 - 2 - 7 - 12 bi 10.8 11.2 11.6
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