Question

3-m,-2+m,6,-7.................-47 these are in A.P. THEN find 'm' value and find last term place?​

Answer 1

Answer:

13/3

Explanation:

a2-a1 = a3-a2

-2+m -(3-m)=6-(-2+m)

-2+m-3+m  =   6+2-m

-5+2m=8-m

2m+m=8+5

3m=13

m=13/3

Answer 2

Answer:

Explanation:

We know that,

a₂-a₁=a₃-a₂=d

⇒(-2+m)-(3-m)=6-(-2+m)

⇒2m-5=8-m

⇒m=13/3

d= -7-6=-13

Now, Tₙ=a+(n-1)d=-47

⇒22/3+(n-1)(-13)=-47

⇒(n-1)(-13)=(-141-22)/3

⇒(n-1)(13)=163/3

⇒13n-13=163/3

⇒13n=(163+39)/3

⇒13n=202/3

⇒n=202/39