Question

there are five arithmetic means inserted between 4 and-8.find the third arithmetic mean

Answer 1

Answer:

Step-by-step explanation:

Here 1st term (a)=4

Last term (tn)=-8

To find: third term (t3)=?

We know,

Tn= a + ( n-1) d

Or, -8=4+(7-1)d

Or,-12=6d

Therefore d=-2

Now t3=4+(3-1)(-2)

=4-4=0