Question

third term of an arithmetic progression is larger than the first term by 12 if the last term is 205 and the 5th term is 25 find the number of terms of the arithmetic progression​

Answer 1

Step-by-step explanation:

ans.35

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Answer 2

Answer:

a5 = 25

a5 = a+4d _ 1 equation

a3 = a1 + 12

a+2d = 12 + a

d = 6

putting the value of d in the EQn 1

25 = a+ 4 ( 6)

25 - 24 = a

1 = a

A.ps 1, 7 , 13 ....,