Write the rule for the value of the nth term of the geometric sequence: -5, -10, -20, -40, ...

Α.
An= 5(-2)"

В.
an = 2(5)n-1

C.
an = -5(2)n-1

D.
an = -2(5)"

Time remaining01: 45: 56complete the proof to show that abcd is a parallelogram.4- 2-32-4--b(-3,4)the-4 + 23+ 2unthe slope of bc isthe slope of ad is -) = 4+2 =-the slope of cd is 27 434) = 2 + 1 -the slope of ba is - - 4+2 -bc | ad and cd / ba because the+2-2c(22)432-3=-6.= -6.-$ 4342 -1a(2-2)therefore,positeabcd is a parallelogram because both pairs (sides are parallel.d(3,-4)save and exitnextsubmitmark this and retum