Question

If the sum of the first n terms of a
is 4n-n2, what is the first term (that is
s.)? What is the sum of first two terms
What is the second term ? Similarly, find
the 3rd, the 10th and the nth terms.​

Answer 1

Answer:

put n=1

S1=4(1)-(1)^2

   =3= first term

put n=2

S2= 4(2)-(2)^2

     =4

second term =S2-S1

                      =4-3

                      =1

SO ,a=3 and d= 1

T3=3

T10=10

Step-by-step explanation:

Answer 2

Answer:

it will be definitel

Step-by-step explanation:

form of it...