All categories

4 years ago

Someone please help me find the sum of these geometric series!! Thank you so much

Mathematics

1 answer:

astraxan [27]4 years ago

4 0

Sum of aritmetic sqeuqnece is
(n/2)(a1+an)
a1=first term
an=nth term
n=how many terms

so we gots
a1=3(1)-4=-1
a18=50
n=18
(18/2)(-1+50)
(9)(49)
441

other one
a1(1-r^(n+1))/(1-r)

2(1-2^(15+1))/(1-(1/4))
about 2 and 2/3, so closer to 3

You might be interested in

Which came first? the chicken or your mom

NemiM [27]

Answer:

what if my moms a chicken?

Step-by-step explanation:

asking for a friend

6 0

3 years ago

Please help need answers

bogdanovich [222]

see explanation below

(1) $\frac{1}{5}$ × $\frac{2}{2}$ = $\frac{2}{10}$ = 0.2

(2) $\frac{6}{25}$ × $\frac{4}{4}$ = $\frac{24}{100}$ = 0.24

(3) 2 $\frac{3}{4}$ = 2 + $\frac{75}{100}$ = 2.75

(4) 3 $\frac{9}{10}$ = 3 + 0.9 = 3.9

(5) 1.25 = 1 $\frac{1}{4}$ = $\frac{5}{4}$

(6) 3.29 = 3 $\frac{29}{100}$ = $\frac{329}{100}$

(7) 0.65 = $\frac{65}{100}$ = $\frac{13}{20}$ in simplest form

(8) 5.6 = 5 $\frac{6}{10}$ = 5 $\frac{3}{5}$ = $\frac{28}{5}$

(9) he is incorrect

$\frac{3}{5}$ × $\frac{20}{20}$ = $\frac{60}{100}$ = 0.6 ≠ 3.5

7 0

3 years ago

Help me plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

victus00 [196]

Answer:

for the second space add a zero then multiply 5x5 and 5x2 add that and move the decimal 2 places to the left its infront of your addition answer.

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

I need some help with this.

zepelin [54]

The domain is the left side of the table, which is (x)

Range is the right side which is (y)

Your answer is B

4 0

3 years ago

Let w be the set of all points in r3 that lie in the xz-plane. is w a subspace of r3?

hichkok12 [17]

<span>It might be helpful to remember that the definitions of R2 and R3 are not geometric at all. R2 is the set of all ordered pairs of real numbers, whereas R3 is the set of all ordered triples of real numbers. W is a subspace fo R3, and so it still consists of elements which are triples, not pairs. The fact that R2 and W can be visualized with the same geometric picture, namely the xy plane, is one way to see in a concrete way the isomorphism which the second poster refered to.</span>

7 0

4 years ago