5. If first term of an A.P is 20 and 6th term is 0, then find its common difference.
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answer = -4
Step-by-step explanation:
given,
a = 20.
find,
the common difference ,d = ?
solution,
a+ 5d = 0. equation 1
put the value of a in the equation first
a+5d =0
20 + 5d = 0
5d = -20
d = -4. Ans
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