If common different of an AP is –6,find a16-a12

1.	If common different of an AP is –6,find a16-a12
Answer» a16= a+15d and a12=a+11d ; a16-a15= a+15d-a+11d = 26 d = 26 (6)=15 6 a+15d-(a + 11d)=4d d=-6=>4d=-24 -24

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