finite geometric sequence

**flexus** · September 26th 2009, 12:34 PM

ok i need some help guys. if anyone is good with a graphing calculator then please help me out.

the directions are to ........(use a graphing utility to find the sum of the finite geometric sequence.) the problem is i dont know how to use my graphing calculator.

10
∑ 10(3/5)^(i-1)
i=1

anyone have a clue? if so can you please teach me?

**skeeter** · September 26th 2009, 12:59 PM

Originally Posted by flexus

ok i need some help guys. if anyone is good with a graphing calculator then please help me out.

the directions are to ........(use a graphing utility to find the sum of the finite geometric sequence.) the problem is i dont know how to use my graphing calculator.

10
∑ 10(3/5)^(i-1)
i=1

anyone have a clue? if so can you please teach me?

$\sum_{i=1}^{10} 10\left(\frac{3}{5}\right)^{i-1} = <br />$

$10 \sum_{i=1}^{10} \left(\frac{3}{5}\right)^{i-1}$

**flexus** · September 26th 2009, 01:05 PM

Originally Posted by skeeter

$\sum_{i=1}^{10} 10\left(\frac{3}{5}\right)^{i-1} = <br />$

$10 \sum_{i=1}^{10} \left(\frac{3}{5}\right)^{i-1}$

thank you thank you thank you. you just save helped me on about 7 other problems by showing me that.

**flexus** · September 26th 2009, 10:30 PM

Originally Posted by skeeter

$\sum_{i=1}^{10} 10\left(\frac{3}{5}\right)^{i-1} = <br />$

$10 \sum_{i=1}^{10} \left(\frac{3}{5}\right)^{i-1}$

i just wanted to ask did you remember how to do that or is there a manual somewhere i can buy to learn to do that?

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