Question

please explain how to do this problem

Answer 1

well you need to find the sum of the 1st 10 terms of a geometric series


so if you substitute x = 1, 2, 3, 4, ..

you'll find the series is

12 + 24 + 48 + 96.....

so you have then number of terms n = 10, 1st term a = 12 and
common ratio r = 2

you just need the formula

\[S_{n} = \frac{a( 1 - r^n)}{1 - r}\]

so in your question you have

\[S_{10} = \frac{12( 1 - 2^{10})}{ 1 - 2}\]

just evaluate it

hope it helps

Answer 2

12276

Answer 3

@campbell_st thank you!!