SOLUTION: 2,24,46 ... Find the 25th term 42,32,22,12 ... Find the 35th term 3,-18,108,-648 ... Find the 22nd term 2,1,1/2,1/4 ... Find the 9th term Someone please help me with these? I

Question 1116961: 2,24,46 ... Find the 25th term
42,32,22,12 ... Find the 35th term
3,-18,108,-648 ... Find the 22nd term
2,1,1/2,1/4 ... Find the 9th term
Someone please help me with these? I need this worksheet done asap

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
2,24,46 ... Find the 25th term
a(1) = 2 ; common difference = d = 22
a(25) = a(1)+(25-1)d = 2+24*22 = 530
----------------------------------------
42,32,22,12 ... Find the 35th term
a(1) = 42 ; d = -10
a(35) = 42 + 34(-10) = -298
-------
3,-18,108,-648 ... Find the 22nd term
a(1) = 3 ; common ratio = -18/3 = r = -6
a(22) = a(1)*r^(n-1) = 3*(-6)^21 = -6.58108519*10^16
-----------------------------
2,1,1/2,1/4 ... Find the 9th term
a(1) = 2 ; r = 1/2
a(9) = 2*(1/2)^8 = 2^7 = 128
-------------
Cheers,
Stan H.
--------------
RELATED QUESTIONS
The first term of G.P is 1�2 and r=2�3 find the 9th term (answered by Fombitz)

if the 5th term & 8th term =30 & if the 25th term is 3 times the 9th term . Find the... (answered by richwmiller)

Find the indicated term of the arithmetic sequence: 25th term: 9, 2, -5,... (answered by Edwin McCravy)

Find the 2nd, 5th, and 9th term... (answered by MathLover1)

Find the 35th term of an A.P whose first term is 6 and common difference is... (answered by Timnewman)

The second term of an arithmetic sequence is 18 and the 9th term is 46. Find the first... (answered by stanbon)

Use the formula below to find the 25th term in the geometric sequence.... (answered by ewatrrr)

1) A second term of a geometric sequence is 24, the fifth term is 81. find the 7th term. (answered by josgarithmetic)

the 3rd term of a Gp is 10 and the 6th term is 80. find 1. the Gp 2. the nth term of... (answered by stanbon)