Question

Write an A.P. whose first term is a and common difference is d in each of the following : a=10, d=5

Answer 1

10,15,20,25,30,....
thanks

Answer 2

Given first term = a = 10 ,

common difference = d = 5 in A.P

second term = a2 = a + d

= 10 + 5 = 15,

Third term = a+ 2d

a3 = 10 + 2 × 5

= 10 + 10 = 10

nth term = a +(n-1)d

an = 10 + ( n - 1 )5

= 10 + 5n - 5

= 5n + 5

Therefore ,

Required A.P is ,

10 , 15, 20 , ..., 5n+5

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