If n term of an A.P is 7 - 2n, then find
conmmon difference.
Answers
Answered by
1
Answer:
sorry for delayed...
Its easy..
Step-by-step explanation:
to find common difference we must know A1 and A2 because formula is D=A2-A1...so...
A1=7-2n ....then put n=1
=7-2×1
=7-2
=5
A2=7-2n....now put n=2
=7-2×2
=7-4
=3
therefore..
common difference D=A2-A1
=3-5
= -2..
therefore common difference is -2.....
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Answered by
1
Step-by-step explanation:
nth term of AP = 7-2n
a1 = 7-2*1
a1 = 5
a2 = 3
a2-a1 = -2
common difference is -2
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