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CBSE Class 10 Answered

ARITHEMATIC PROGRESSION
Asked by chahat | 11 Mar, 2009, 10:45: AM
Expert Answer

In an A.P. the difference between the consecutive terms( taken in the same order) is the same

So,

  3rd term - 2nd term = 2nd term - first term

So,

(3k+2)-(k+5)=(k+5)-(2k-7)

2k-3= -k+12

3k=15

k=5

Check:   by substituting k=5, we see that,the terms in A.P. are 3,10, 17

 

Answered by | 11 Mar, 2009, 12:09: PM
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