Question:
a11-a6=20 what is the common difference
Answer:
Let a is the first term and d is the common difference.
Given, a11 - a6 = 20
=> {a + (11 - 1)d} - {a + (6 - 1)d} = 20
=> a + 10d - a - 5d = 20
=> 5d = 20
=> d = 20/5
=> d = 4
So, the common difference is 4
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