f(x) = 15(2)^n-1 help me solve? .

Question

f(x) = 15(2)^n-1 
help me solve? >.<

imqwerty · Answer

$\large 15(2)^n-1$ 

okay what do we need to solve here? =]

imqwerty · Answer

are we finding $n$ for which the given function has the value 0 or something else is given in the question?

anonymous · Answer

Anthony goes to the gym for 15 minutes on Monday. Every day he increases his gym time by 2. If he continues this pattern, how many minutes will he spend at the gym on the 5th day?

anonymous · Answer

then i created the function, f(x)=15(2)^n-1

imqwerty · Answer

the function that you made is correct :)
theres a little correction in it tho

$\large f(\color{red}n)=15(2)^{n-1}$


i did it $f(n)$ because the function is in terms of $n$ and not $x$

here $f(n)$ denotes the number of minutes he spends in the gym
and $n$ is the $n^{th}$ day at gym

we need to find the find time spent on the 5th day so just plug in $n=5$ in the expression and you'll get the answer :)

anonymous · Answer

thank you very much c:

imqwerty · Answer

np :)