Question

For an A.P. a=101,d=-4. What is the value of 'n', if tn = 57 ?

Answer 1

Hi

Good morning

Here is your answer

a: 101
d: -4
n: ?
tn: 57

we know the formula

tn : a +(n -1) d

put the values

57 : 101 + ( n - 1) -4

57 - 101 = (n - 1) -4

- 44 = ( n - 1) -4

-44/ -4 = ( n-1)

( n - 1) = 11

n = 11 + 1

n = 12.

May it is helpful for you.

✌✌Have a great day ✌✌

Answer 2

Answer:

12

Step-by-step explanation:

hello everyone

Here, a =101

d=-4

tn=57

n=?

we know that ,

tn=a+(n-1)d

57=101+(n-1)-4

57-101=(n-1)-4

-44+4=n-1

-11= n-1

n=11-1

n=12