Wednesday

January 28, 2015

January 28, 2015

Posted by **Hussain** on Tuesday, May 14, 2013 at 1:45pm.

- arithmetic -
**Reiny**, Tuesday, May 14, 2013 at 3:07pmthe sequence would be

5 , 5+d , 5+2d , 5+3d , .... , 5 + (n-2)d , 32

for n+2 terms

3rd mean = 4th term = a+3d

7th mean = 8th term = a + 7d

but a = 5

(5+3d)/(5+7d) = 7/13

35 + 49d = 65 +39d

10d = 30

d = 30/10 = 3

so a + ((n+2)-1)d = 32

5 + (n+1)(3) = 32

3n+3 = 27

3n = 24

n = 8

check:

5**8 11 14 17 20 23 26 29**32

**Answer this Question**

**Related Questions**

arithmetic - 1. The first and last term of an A.P are, a and l respectively, ...

arithmetic - 1. The first and last term of an A.P are, a and l respectively, ...

algebra - I'm pretty sure these are right but I just want to check. 1)Find the ...

algebra - I'm pretty sure these are right but I just want to check. 1)Find the ...

algebra - I'm pretty sure these are right but I just want to check. 1)Find the ...

algebra - 1)Find the 20th term of the arithmetic sequence in which a1=3 and d=7 ...

algebra(check) - I'm pretty sure these are right but I just want to check. 1)...

arithmetic - Find 4 arithmetic means between -root(5) and 12 root (5)

math - The 3rd term in an arithmetic sequence is 12, the 7th term is 24, a) How...

math - Hi I need someone to check my answers I'll show whatever work I have but ...