Question

what is the first 3 terms of the geometric sequence and the nth term of: a1=4, r=1/2

Answer 1

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Answer 2

4 , 2, 1

nth term = a r ^ (n-1)

= 4 * (1/2^(n-1)

Answer 3

a1, 4
a2, 4(1/2)
a3, 4(1/2)(1/2)
a4, 4(1/2)(1/2)(1/2)

Answer 4

an = 4(1/2)^(n-1) ; yep

Answer 5

\[4(1/2)^n-1\]

Answer 6

\[a_n=4(1/2)^{n-1}\]

Answer 7

gotta put the {} around the exponent in latex to get it all