Question

123

Answer 1

well you know that

\[a_{2} = a \times r\]

or \[50 = a \times r\]

the 4th term

\[a_{4} = a \times r^3\]'

rewriting this equation it can be

\[112.5 = a \times r \times r^2\]

substitute that value for a x r

and its

\[112.5 = 50 \times r^2\]

now just solve for r

Answer 2

r^2=2.25?

Answer 3

yep... so take the square root to find the value of r

Answer 4

1.5?

Answer 5

thats it... thats r

Answer 6

hope it all made sense

Answer 7

i got it! thank you