2)
In an A.P. if the 4th term is 9 and the 7th term is 15, the common difference is
A) 2
B) 3
C) 6
D) 5
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2
Answer:
since 4 & 7 terms are given we assume that a+3d=9 & for seventh term:a+6d=15 .by substituting a+3d in terms of seventh term I. e. a+3d+3d ,we get the as 9+3d=15 on further solving we get d as 2.therefore the answer is A) 2
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5Answer:
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