From the patttern find X and explain: -3, 12, -36, X

Question

I Can Not Fig It Out 

Answer 1

-3, 12, -36, X

 

12/(-3) = -4

 

-36/12 = -3

 

X/(-36) = -4 ; guessing multiplier alternates between -4 and -3

X = 144

 

OR

 

X/(-36) = -2 ; guessing multiplier increases by 1

X = 72

 

OR

X/(-36) = -9/4 ; guessing multiplier is 3/4 of previous multiplier
X = 81

Answer 2

Hi Kelesia;

-3, 12, -36, X

 

(-3)(-4)=12

(12)(-3)=-36

(-36)(-2)=72

 

x=72

 

Answer 3

-3  ,12 , -36 , X 

 

 - 3, 12, -36 , 144

 

first term -3 , 2nd term , -3 * -4 = 12

 

third term  -3* 12 ( -36)

 

forth term  -3 * -4  = 144