Question

Find the 21st term of the A.P 13,19,25.________​

Answer 1

Answer:

añ=133

Step-by-step explanation:

a=13

d=19-13=6

n=21

añ=a+(n-1)d

añ=13+20×6

añ=133

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Answer 2

Answer:

The 21th term is 133

Step-by-step explanation:

13,19, 25 .. ..

a = 13,

d = a2 - a1  

d = 19 - 13

= 6

given: n = 21

aₙ = a + (n - 1)d

a₂₁ = 13 + (21 - 1)6

= 13 + (20)6

= 13 + 120

= 133