Question

Plz help 10points :)

Answer 1

Answer:

196608

Step-by-step explanation:

3, -12, 48, -192, ... is a geometric sequence with first term 3 and common ratio -4.  Note that (-12)(-4) = 48, that (48)(-4) = -192, and so on.  The general formula for a geom. seq. is a(n) = a(1)r^(n-1), where a(1) is the first term and r is the common ratio.  In this particular case, we have

a(n) = 3*(-4)^(9-1) = 3*(-4)^8 = 3(65536) = 196608