Question

3.
In an A.P.:
139
12"
125, find d and a no
10
(iv)
given a =5, d=3, a = 50, find n and S
given a = 7,2,3 = 35, find d and S
given a 2 = 37, d=3, find a and S
given a = 15, S
=
given a=2, d=8, S = 90, find n and a
given a = 4, d=2, S = -14, find n and a.
given 1=28, S = 144, and there are total 9 terms, find a
n п
n(plz help me with 6th,3rd,7th bits)​

Answer 1

Answer:

• I don't know what the answers my friend

Answer 2

Step-by-step explanation:

divide 81 by me dance with me divide 54 by me it is 6 you will see who am ILet "me" be the number x. It is unknown as this point.

81 divided by x = x

81/x = x

81 = x*x ... Multiply both sides by x.

81 = x^2

x^2 = 81

x = sqrt(81)

x = 9

Notice how 54/x = 54/9 = 6. So that checks out.