Answer:
Step-by-step explanation:
As we Know that formula for arithmetic sequence is
and for geometric sequence is
So,
According to given conditions
By dividing equation (i) and (ii)
Hence proved that
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Answer:
15
integers from 1 to 9 have only one number each, so in total 9 numbers. integers from 10 to 12 have 2 numbers each, 3*2=6. 9+6=15
Answer: 15
Step-by-step explanation:
I am assuming the equation is set up like this:
(x+9)/3 = 8
Multipy by 3 to both sides
x + 9 = 24
Subtract 9
x = 15
Answer:
C
Step-by-step explanation: