If a20-a12 = -32, then the common difference of
the AP is​

2 thoughts on “If a20-a12 = -32, then the common difference of<br />the AP is​”

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2. Answer:

   Common Difference = -4

   Step-by-step explanation:

   Formula of a term in an AP is

   nTh term = a + (n-1) d

   where a is the first term of that AP and d is the common difference of the AP.

   Therefore,

   a20 = a + 19d

   and

   a12 = a +11d

   therefore

   a + 19d – a – 11d = -32

   8d = -32

   d = -4

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