Question

Find an equation for the nth term of the sequence.

-1, -4, -16, -64, ...

an = -1 • 4n - 1

an = -1 • 4n

an = 4 • -1n

an = 4 • -1n + 1

Answer 1

@ParthKohli

Answer 2

will give best answer & medal!

Answer 3

@phi

Answer 4

@RANE

Answer 5

@AravindG

Answer 6

What pattern do you observe in the given set of numbers?

Answer 7

multiplied by 4 every time! :)

Answer 8

Very good :)

So we can write nth term as?

Answer 9

sorry: an = -1 x 4^n

Answer 10

Not 4^n it is 4n

Answer 11

Well it didn't show up on here but on the test the n is a little bit above the four

Answer 12

You can always check this by plugging in values.

Put n-1,2,3,...in -1 *4n You can see that you get the sequence.

Answer 13

Okay, perfect! thank you :) Can you help me with another question? I'll tag you in it :)

Answer 14

Yep. Make it fast though.

Answer 15

Will do!