# math

hi
i startted the problem below by writing a sigma notation
of
sigma[(2^(n+1))/((n+1)!)]

QUESTION:

how do i find the sum of 2+(4/2!)+(8/3!)+(16/4!)+...

was my attempt wrong, or how do i go from here? thank you!

1. 👍 0
2. 👎 0
3. 👁 183
1. Express the individual elements of each term in terms of i.
For the 3rd term, i=3, then
8/3!=2*³/3! = 2³/i!
Verify with another term:
for i=4,
2^i/i!=16/4! = 4th term, OK
Check the first term (which does not have the same form), i=1
2^1/1! = 2/1 = 2 OK

So the sum would be:
Σ2^i /i! for i=1 to ∞

1. 👍 0
2. 👎 0

## Similar Questions

1. ### math

rewrite the series in sigma notation 4+16+64+...+256+1024

2. ### Math

How do I use the sigma notation to express the series : 1+5+25+125+625+3125?

3. ### Calculus

Express the following in Sigma notation 2+8+18+32+50+72

4. ### Calculus

Express the following in Sigma notation 2+8+18+32+50+72

1. ### Math

Write 5+7+9+11+13+15+17 in sigma notation.

2. ### Algebra 2

Evaluate 20(0.5)^(n-1) when n= 3 to 12. Use sigma notation .

3. ### Math

Exprees each series using sigma notation. 3+6+9+12+15

4. ### math

write the following in a sigma notation 3/32+3/16+3/8+...+12288 so far ive gotten that a=3/32 and r=2/1 can you please help me further

1. ### Statistics

Is a sampling distribution always the same as the curve for a null hypothesis? How does the power of a z test change when sigma increases? Assuming that they are caused solely by chance, sampling distributions will approximate a

2. ### Chemistry

How many pi bonds and sigma bonds are in ritalin. I counted 4 pi bonds(double bonds), and 18 sigma bonds(single bonds> I want to make sure I didn't miss count anything.

3. ### Physics

A spherical shell of radius R carries a uniform surface charge density (charge per unit area) \sigma. The center of the sphere is at the origin and the shell rotates with angular velocity \omega (in rad/sec) around the z-axis (z=0

4. ### Calculus

Express the sum using sigma notation 1+ 5/6+ 6/8+ 7/10 + 8/12
{"found_math": false, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 0, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0}