, 15.05.2020Rosalesdhan

# Find the nth term of the geometric sequence whose first three terms are 2, -2 72​

UY may nang samar dito delete mo answer nya

Step-by-step explanation:

this is a geometric sequence with  r =  -12/2  = -6

nth term  =     a(-6)^ n-1     / where a  = first term

A. -256

Step-by-step explanation:

Given:

a1 = -4

r = 2

n = 7

a7 = -4 (2) 7-1

= -4 (2)⁶

= -4 (64)

a7 = -256

7th term is 15625

Step-by-step explanation:

Formula for finding any term in geometric sequence:

an = a1 (r) ^n-1

a7 = 1 ( 5)^(7-1)

= 5^6

= 15625

524288

Step-by-step explanation:

128,512,2048,8192,32768,131072,524288

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