1.

Find the 19th term of the following A.P. 7,13,19,25…..

Answer»

The given A.P. is 7, 13, 19, 25,… 

Here, a = 7, d = 13 – 7 = 6 

Since, tn = a + (n – 1)d

∴ t19 = 7 + (19 – 1)6 

= 7 + 18 × 6 

= 7 + 108 

∴ t19 = 115 

∴ 19th term of the given A.P. is 115.



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