Question

find the 10th term of series 12+10+8​

Answer 1

Step-by-step explanation:

AP:8,10,12,...126

                  a=8,d=2,an=126

                  Now an=a+(n−1)d

                  126=8+(n−1)2

                  ⇒118=(n−1)2

                  ⇒59=n−1

                  ⇒n=60

                Now 10th term from last is (60−10+1)th term

=51th term from beginning

So, a51=a+(51−1)d

=8+50×2

=8+100=108

I hope my answer helps you.

Answer 2

Answer:

a=12 d=-2 n=10 an=?

an = a+ (n-1)d

a10=12+(10-1)-2

a10=12+(-18)

a10=-6