Question

Which term of the A. P. 1,4,7..... is 55 ?​

Answer 1

Answer:

an=a+(n-1)d

an= 55

a=1

d= 4-1=3

Substituting the values we get

55= 1+(n-1)3

55= 1+3n-3

55= 3n-2

55+2= 3n

57= 3n

n= 57/3

n= 19

Answer 2

Step-by-step explanation:

a2-a1=4-1=3

an=55

a+(n-1) d=55

1+(n-1)3=55

(n-1)3=55-1

(n-1)3=54

n-1=54/3

n-1=18

n=18+1=19

Hence 19th term...

Is 55

Mark as brainlist