Question

if the 2nd and 5th term of an ap is 7 and 19 then the first term is

Answer 1

Answer:

a = 3

Step-by-step explanation:

2nd term = a + d = 7

5th term = a + 4d = 19

a = 7 - d

a = 19 - 4d

Taking both a equal

7 - d = 19 - 4d

3d = 12

d = 4

Put the value of d in any of the equation

a = 7 - 4

a = 3

Note: Since we have to find 1st term then we can directly take d equal and cam get a value directly

Hope it helps!!