Q5 of 176 Page 9

For the following A.P's write the first term and common difference:

In general, for an AP a1, a2, . . . .,an, we have


d = ak+1 - ak


where ak+1 and ak are the (k+1)th and kth terms respectively.


For the list of numbers:





Here, the difference of any two consecutive terms in each case is -1. So, the given list is an AP whose first term a is and common difference d is -1.


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Which of the following list of numbers form A.R's? If they form an A.P., find the common difference d and also write its next three terms.

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