Question

Find the 8th term of the geometric sequence show below
−4x2,12x6,−36x10,...
Common Ratio: r=a2a1
r=12x6−4x2=−3x4
an=a1⋅rn−1 General Formula
a8=−4x2(−3x4)7
a8=−4x2(−2187x28) Exponent
a8=8748x30

I do not understand how you get -2187

Answer 1

The numbers after the x's are exponents

Answer 2

r=a2/a1
=72/-8
=-9

Answer 3

a8=-8*(-9)^7

Answer 4

solve this u will get the answer

Answer 5

@gumstopper getting or not??