if 7th and 6th terms of an A.P are 25 and 32, what is the value of d
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Answer:
a7=25. a+6d=25 ......... (1)
a6=32. a+5d=32 .........(2)
By Elimination Method
a+6d=25
a+5d=32
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d=25-32
d = -7 ans
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