What is the explicit formula for this sequence? 4, –8, 16, –32, ...

A.
an = 4 • (–2)(n – 1)

B.
an = 4 • (–2)n

C.
an = –2 • 4(n – 1)

D.
an = 2 • (–4)n
What is the explicit formula for this sequence?

4, –8, 16, –32, ...

A.
an = 4 • (–2)(n – 1)

B.
an = 4 • (–2)n

C.
an = –2 • 4(n – 1)

D.
an = 2 • (–4)n

answer:

given the linear inequality :

add 2y to both sides we get;

simplify:

add 12 to both sides of an equation;

simplify:

divide both sides by 2 we get;

or

the related equation for the inequality equation [1] is;

y-intercepts defined as the graph crosses the y-axis.

substitute x =0 in [2] to solve for y;

y = 6

x-intercepts defined as the graph crosses the x-axis.

substitute value y = 0 to solve for x;

subtract 6 from both sides we get

multiply both sides by 2 we get;

or

x = -12

now, plot these point (0, 6) and (-12, 0) on graph as shown below and shade the graph below the solid line.

answer: i think its b