Break the expression into two groups, then if you factor out what you need to do, then factor out the common term, you'll end up with ( 3x - 11 ) ( x - 10 )
an = a1r^(n-1)
a5 = a1 r^(5-1)
-6 =a1 r^4
a2 = a1 r^(2-1)
-48 = a1 r
divide
-6 =a1 r^4
---------------- yields 1/8 = r^3 take the cube root or each side
-48 = a1 r 1/2 = r
an = a1r^(n-1)
an = a1 (1/2)^ (n-1)
-48 = a1 (1/2) ^1
divide by 1/2
-96 = a1
an = -96 (1/2)^ (n-1)
the sum
Sn = a1[(r^n - 1/(r - 1)]
S18 = -96 [( (1/2) ^17 -1/ (1/2 -1)]
=-96 [ (1/2) ^ 17 -1 /-1/2]
= 192 * [-131071/131072]
approximately -192
2.5 pints. Look it up. That's what I would do
Answer:
Step-by-step explanation:
We need to find the sum of 
and 
first.
Adding +
Combining like terms, we get
-2ab+2ab = 0
Therefore,
.
Now, we need to find the sum of 
.
Adding 
.
Combining like terms, we get
.
Therefore,
Now, subtracting
.
Distributing minus sign over second parenthesis, we get
.
Combining like terms,
Therefore,
.
Therefore, the difference of the sum of + and 
is 
Simplified complex fraction: 1/21
