Question

can someone please help me with this? i will MEDAL AND FAN!!
picture posted below:)

Answer 1

@ganeshie8

Answer 2

@campbell_st can you help?

Answer 3

\[\sum_{0}^{Inf}(-x)^{n}=\frac{ 1 }{ 1+x }\] (from power series of 1/(1+x))

Answer 4

Put x=1/2 and multiply the sum by -4.

Answer 5

Can u help me do that?

Answer 6

which part?

Answer 7

do you know the power series of Log (1+x)?

Answer 8

you're in 12th grade, right kelly ?

since |r| = |-1/2| = 1/2 is less than 1, the series converges

Answer 9

to find the infinite sum, use below formula :
infinite sum = \(\large \dfrac{a}{1-r}\)

Answer 10

im in 11th:) what does a stand for?

Answer 11

first term

Answer 12

plugin n = 1 to get the first term

Answer 13

@ganeshie8 damn that's a gp lol XD @kel Sorry didn't know you were in 11th :P

Answer 14

thanks guys!!:)

Answer 15

:) yw !