Question

the first term is 5
last term is 45
The first term
sum of all terms is 400 find the number
of terms & comm
on difference of Ap-​

Answer 1

Answer:

Values of n = 16 and

Values of n = 16 and d = 8/3

Step-by-step explanation:

Let a , d , l are first term , common difference and last term of an A.P , respectively.

given ,

a = 5, l = 45

We know that,

Substitute values of a and l , we get,

=> 45 = 5+(n-1)d

=> 45-5 = (n-1)d

=> (n-1)d=40 ----(1)

\* given *\

Now ,

Substitute n=16 in equation (1), we get

(16-1)d = 40

=> 15d =40

=> d = 40/15

=> d = 8/3

Therefore,

Values of n = 16 and

d = 8/3

Read more on Brainly.in - https://brainly.in/question/1994498#readmore