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Question

For the following APs, write the first term and the common difference:
(i) 3,1,1,3,....
(ii) 5,1,3,7,.....
(iii) 13,53,93,133,....
(iv) 0.6,1.7,2.8,3.9,...

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Solution

(i) 3,1,1,3
Here, first term, a=3
Common difference, d= Second term First term
d=13=2
(ii) 5,1,3,7
Here, first term, a=5
Common difference, d= Second term First term
d=(1)(5)=1+5=4

(iii) 13,53,93,133
Here, first term, a=13
Common difference, d= Second term First term
d=5313=43

(iv) 0.6,1.7,2.8,3.9
Here, first term, a=0.6
Common difference, d= Second term First term
d=1.70.6
=1.1

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