Answer:

Step-by-step explanation:
To find the
we must use the cosine theorem.
The cosine theorem says that:

In this case:



So




Answer:
the answer is f(x) = n*(-2)
ratio is the wrong word to use, it is for contolled variation in probability. a sequence is controlled by what is known as a function - f(x) is the symbol for a function
Step-by-step explanation:
the following number of the previous one in the sequence is derived by the function f(x)=n*(-2)
2 x -2 = -4 (positive x negative = negative)
-4 × -2 = 8 (negative x negative = positive)
8 x -2 = -16 (positive x negative = negative)
so in the sequence, the trend of -,+ double will go on
D
1/8 = 0.125
0.125*5=0.625
0.625+1=1 5/8
3. 4y-3
because 1/3*12y - 1/3*9 = 4y - 3