iunicornprincess iunicornprincess

18-09-2020
Mathematics

contestada

2. The sum of the third and the seventh terms
of an AP is 6 and their product is 8. Find
the sum of first sixteen terms of the AP.

Respuesta :

aryanjangra506 aryanjangra506

18-09-2020

Step-by-step explanation:

a3+a7=6

a+2d+a+6d=6

2a+8d=6

a+4d=3..... (1)

a+2d)(a+6d)=8

(3-4d+2d)(3-4d+6d)=8

(3-2d)(3+2d)=8

9-4d^2=8

d=1/2

a=1

s16=n/2 [2a+(n-1) d]

=8 (2+15/2)

=8×19/2

=76

Answer Link

Otras preguntas

A graduate student is almost done with his dissertation when he is informed that twenty years ago someone did a very similar project and already demonstrated wh

which property is the difference between fog and clouds?

We say that an economy experience inflation if- prices of all goods have increased.- relative price between capital goods and consumption goods has increased.-

What happens when Montag is attacked by the mechanical hound?

The introduction of mobile phones, and their widespread use by individuals all over the world, has influenced all kinds of factors, including car accident rates

Alison won a huge basket containing 234 candies at a raffle. She decided to split the candies evenly among the 9 members of her girl scout troop how many candie

You are interested in finding out the effect that crowding has on people's moods. You conduct a study in a psychology research lab using two types of participan

I believe much trouble and blood would be saved if we opened our hearts more. I will tell you in my way how the Indian sees things. The white man has more words

what provisions did the civil rights act of 1964 include?

I need help with this question!! Please