3 years ago

Find the sum of the first 6 terms in the sequence -5 -25 -125 -625

1 answer:

5 0

This is a geometric sequence, so use the formula for the sum of a geometric sequence:
Sum = (a(r^n - 1))/(r - 1)
where a is the first term, -5
r is the common ratio, 5
and n is the number of terms

Thus,
Sum = ((-5)(5^6 - 1))/(5-1) = -19530

You might be interested in

Write all prime numbers from 20 to 50.

givi [52]

Answer:

So, 23, 29, 31, 37, 41, 43 and 47 these are the prime numbers between 20 and 50.

Step-by-step explanation:

plz mark me brainliest

5 0

3 years ago

Read 2 more answers

Which expressions are equivalent to 4x^2-25? Select all that apply

Kazeer [188]

(2x-5) • (2x+5) are the expressions equivalent to 4x^2-25

3 0

2 years ago

Find the solution set of the inequality 7x−10≥16.

xenn [34]

×≥ 26/7 is the answer.

hope it helps!

5 0

4 years ago

Solve perfect square equation<br>х^2 +6х + 9 = 8

LiRa [457]

Answer:

$\large\boxed{x=-3-2\sqrt2\ \vee\ x=-2+2\sqrt2}$

Step-by-step explanation:

$x^2+6x+9=8\\\\x^2+2(x)(3)+3^2=8\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\(x+3)^2=8\iff x+3=\pm\sqrt8\\\\x+3=\pm\sqrt{4\cdot2}\\\\x+3=\pm\sqrt4\cdot\sqrt2\\\\x+3=\pm2\sqrt2\qquad\text{subtract 3 from both sides}\\\\x=-3-2\sqrt2\ \vee\ x=-2+2\sqrt2$

8 0

3 years ago

Can u pls help and put them by the answer

tiny-mole [99]

Answer:

Step-by-step explanation:

to find range find the lower number and subtract from the biggest number..

so the the bigger number is 54 and the lower number is 3 so you would have to do is 54-3=51

6 0

3 years ago