Nirobi
Nirobi Nirobi
  • 24-08-2019
  • Mathematics
contestada

Find the sum of the first 8 terms of the sequence.

1, -3, -7, -11, …

Thank you!

Respuesta :

jasondcastellan
jasondcastellan jasondcastellan
  • 24-08-2019

Answer:1,-3,-7,-11,-15,-19,-23,-27,-31

Step-by-step explanation:

You just subtract -4 every time.

Answer Link
Аноним Аноним
  • 24-08-2019

Answer:

-104.

Step-by-step explanation:

This is an arithmetic sequence with first term 1 and common difference -4.

Sum of n terms = (n/2)[2a1 + (n-1)d]  where a1 = the first term and d=common difference.

S(8) = (8/2) ( 2*1 + (8-1)*-4)

=  4 *  (2  + 7*-4)

= 4 * (-26)

= -104.

Answer Link

Otras preguntas

WHOEVER SAYS SOMETHING FIRST GETS BRAINLIEST
Iron has a density of 7.86 g/cm3. Calculate the volume (in dL) of a piece of iron having a mass of 4.59 kg .
how do I identify different terms in an equation
Which subatomic particle is important in chemical building and helps determine chemical properties
Find the volume of this object. Use 3 for 1. V=7r2h Volume of a Cylinder 4 ft. 12 ft
4 over 9 divided by 12 over 27
Join the following pairs of sentences using the instructions given in the brackects 1. A golfer was bitten on one of his little fingers by a dog. The bute has r
how many bone are found in human body​
HOW MANY DEGREES IN A SUPPLEMENTARY ANGLE???
how did the environment shape seljuk empire?