Question

Determine the AP whose 3rd term is -6 and 7th term is -30​

Answer 1

Answer:

i am don't know this answer

Answer 2

Answer:

the AP is 6,0,-6,-12,... where first term (a) =6 and

common difference (d) = -6

Step-by-step explanation:

Here, 3rd term = a+ 2d

=>-6 = a + 2d------(i)

And, 7 th term = a+ 6d

=>-30 = a+ 6d---(ii)

Solving (i) and (ii),we get

d = -6

Putting d = -6 in (i), we get

a = 6

Hence, the required AP is 6,0,-6,-12,...