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a. Find the sixth term of a geometric sequence for which a1 = -3 and r = -2

 

b. Write an equation for the nth term of the geometric sequence 5, 10, 20, 40, . . .

 

c. Find the seventh term of a geometric sequence for which a3 = 96 and r = 2.

 Feb 24, 2019
 #1
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A         a1* r^(n-1) =   -3 * -2^5 =  96

 

B  nth= 5* r^(n-1) = 5 * 2^(n-1)

 

c  if a3 =96  and r =2      then    a2 = a3/r = 48       a1 = a2/r =24      a7 =  a1*r(n-1) = 24*2^6 = 1536

 Feb 24, 2019

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