Question

) 1) Arithmetic sequence
First term -10
Seventh term= -1
a) Common difference?

Answer 1

Answer:

First term of an a.p.=-10

Common difference of an a.p.d=?

We know that

tn=a+(n-1)d

here tn=-1,n=7,a=-10

-1=-10+(7-1)d

-1=-10+7d-d

-1=-10+6d

-1+10-6d=0

9-6d=0

-6d=-9

d=9/6

d=3/2