Question

determine the AP whose 3r term is -6 and 7th term is-14​

Answer 1

Step-by-step explanation:

i purchased a hair dryer for rs 2400 including 6% VAT. find the price before VAT

Answer 2

Answer:

Well, it's easy.

3rd term= a+2d= -6

7th term= a+6d= -14

Now, by elimination,

(if we subtract both the equation, it will cancel out, you may have learned it in linear equation with two variables)

a+2d-a-6d=14-6

-4d=8

d= -2

Now, you are smart enough to calculate a, isn't it

?

After calculating a and d, you can find the AP

By a, a+d, a+2d,a+3d........

Try the rest yourself, it will make you confident.