Answer: 7 × ( 3^n - 1 )
Step-by-step explanation:
This is a geometric progression which has its nth term to be
Tn = ar^n- 1. Now from the question given, the sequence are 7, 21, 63, 189. This is an example of a finite sequence, To find the common ratio, you divide the second term by the first term. So
r = 21/7
= 3. , a = 7
Now to find the nth term put the values in the formula above.
Tn =ar^n-1
= 7(3)^n - 1)
= 7 × ( 3^n - 1 ).
Note, it is not 21^n - 1.
Answer:
q is less than or equal to 30.5
Step-by-step explanation:
Divide both sides by -3, but change the sign (bc you're dividing by a negative)
Answer:
-6 - square root 31, -6 + square root 31
Answer:
wea did tha r come from??
Step-by-step explanation:
it is supposed to be d
