Arithmetic progression
1)What is the difference between the given sequence, 1,4,7,10,13...... 
  

2)30th term of the AP: 10, 7, 4,..., is.... 
  

3)In an AP, if d = -4, n=7, an =4, then a is 
  

4)How many terms of an AP must be taken for their sum to be equal to 120 if its third term is 9 and the difference between the seventh and second term is 20 ? 
  

5)In an AP, if a = 3.5, n=101, d=0, then an will be 
  

6)Which term of the AP: 21, 42, 63…………………….is 210? 
  

7)The 4th term from the end of the AP: -11,-8, -5……………49 is 
  


  


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