Friday

March 27, 2015

March 27, 2015

Posted by **Bethany** on Friday, December 30, 2011 at 1:24pm.

1.Write in expanded form: this is a sigma notation-

4 on top

signma in middle

k=1 on bottom

to right of sigma is (k-1)(k-2)

I solved:

k=1 (1-1)(1-2)=0(-1)=0

K=2 (2-1)(2-2) = 1(0)=0

k=3(3-1)(3-2)=2(1)=2

k=4 (4-1)(4-)=3(2)=6

answer: 0+0+2+6

2. Write 4+9+16+25+36+49+64 in sigma notation

answer: 8 on top

sigma in middle

i=2 on bottom

x^2 to right of sigma

3. Write 88+79+70+61+...+-83 in sigma notation

my work:there is (-9) common difference

97-9(1)=88

97-9(2)=79

97-9(3)=70

97-9(4)=61

97-9(20)= -83

20 on top

sigma in middle

answer:i=1 on bottom to right of sigma is 97-9n

- Pre-CalcPlease check -
**Damon**, Friday, December 30, 2011 at 2:09pmThese look good to me except a typo in the first one

k=4 (4-1)(4-***2***)=3(2)=6

- Pre-CalcPlease check -
**Bethany**, Friday, December 30, 2011 at 4:00pmThank you

**Answer this Question**

**Related Questions**

Pre-Calc-Please check answer - 1.Write 4+6+8+10 in sigma notation: I came up ...

Pre-Calc-Please check answer - 1.Write 4+6+8+10 in sigma notation: I came up ...

Algebra II - Please help-I need to write 4+6+8+10 in sigma notation would it be ...

Pre-Calc-please check - Please check this for me expand (3z-2b)^5 using Binomial...

Pre-Calc-Please check - 1.Write 4+6+8+10 in sigma notation: I came up with sigma...

Maths - Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5...

Maths - Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5...

Maths - Express the sum using summation notation: 1 - 1/2 + 1/3 - 1/4 + 1/5...

math - I just need help with this. Write the series in sigma notation. 1/4 + 1/2...

math - I just need help with this. Write the series in sigma notation. 1/4 + 1/2...