Let us check series : -10 /-2 = 5 -50/-10 = 5
so it is a geometric series with a= -2 and r= 5
sum formula for n terms of geometric series = a ( r^n -1 ) /( r-1)
here we find S5 that is n= 5 = -2 ( 5^ 5 - 1) /( 5-1)
= -2 ( 3125 -1) / 4 = -1562
second series is : 1.5/1 = 1.5 2.25/1.5 = 1.5
this is also geometric series but n = 12 a= 1 and r= 1.5
we use same formula
S12 = 1 ( (1.5) ^12 -1) /( 1.5-1) =
128.74 / 0.5 = 257.49
Last is 2/1= 2 4/2 = 2 8/4 = 2 so r = 2 a = 1 and n = 12
we use same formula 1 ( 2^12 - 1) / (2-1)
= 4095
Answers : -1562 , 257.49 , 4095
Answer:
14
Step-by-step explanation:
44-9=35
35+77=122
122÷8=14
Answer:
help me first on this question
Step-by-step explanation:
Answer:
b. 
Step-by-step explanation:
Given expression is:
Let us factorize the numerator using the formula:
Since x ≠ 3, let us cancel the common factor x - 3 in the numerator and in the denominator.
So, 
Answer:
yes
Step-by-step explanation:
its correct because divide by 2/ 28/16=14/8
maybe
