Question

The first and the last term of an Ap are 2 and 205 resp if there are 30 terms in Ap then the common difference is​

Answer 1

Answer:

d=7

Step-by-step explanation:

a=2,an=205,d=?

an=a+(n-1)*d

205=2+(30-1)*d

205-2=29*d

203=29*d

d=203/29

d=7

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Answer 2

Answer:

Given, a= 2 ; l= 205 and n= 30

Step-by-step explanation:

therefore, from formula

=> l = a+ (n-1)d

=> 205= 2+(30-1)d

=> 205=2+29d

=> 205-2= 29d

=> 203= 29d

=> 203/29= d

=> 7 = d

i.e. The common difference (d) is 7. (Ans.)