Question

find 19th term of following a.p.

solve step by step.

A.P 7, 13, 19 ,25.......​

Answer 1

Answer:

Step-by-step explanation:

For this AP,

a = 7 and d = 6

Using tn = a + (n - 1)d,

t₁₉ = 7 + (19 - 1)6

t₁₉ = 7 + 18 x 6

t₁₉ = 7 + 108

∴ t₁₉ = 115

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Answer 2

Answer:

here,

a=7

d=13-7=6

By using formula,

an=a+18d

Putting values

a19=7+18×6

=7+108

=115

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