Consider the following geometric sequence. -5, 10, -20, 40,... If the recursive formula for the sequence above is expressed in the form an=b(cn-1)nwhat is b and c
The formula of the geometric sequence is the following : [tex]u_n=bc^{n-1}[/tex] wherein b is the first term and c is the rate. From the given data we deduce the parameters: [tex]c=\dfrac{10}{-5}=-2,b=-5[/tex] Therefore: [tex]u_n=-5(-2)^{n-1}[/tex]
