Question

s = 1+2x + 4x^2 +8x ^3​

Answer 1

Answer:

1/4

Step-by-step explanation:

can't give

but pls mark me the brainliest

Answer 2

Given that s = 1+2x + 4x^2 +8x ^3​,  find x=?

Step-by-step explanation:

• This sum can be evaluated by noticing that  2y*x+1 =y
• hence  yx =(y-1)/2
• then x=(y-1)/2y
• y=1/(1−2x)
• and is valid for all |x|<1/2.
• If |x|>=1, then y will be infinity. If it's less than 1, then the sum is 1/(1-2x) as Michael pointed out.