Can anyone help me with this question please?
The function "f" is defined by f:x = 73x. If f(24) = kf (2), find the value of k.
Thanks.

Cutclutc
i think that the answer is k = 5
f:x = 73x
f(24) = 73(24)
f(24) = 772
f(24) = 65
kf(2) = k(73(2))
f(2) = 13
k = 65/13
k = 5

joecole
Thanks a million. That the answer in the marking scheme.

AssemblyRequired
Just a question: if f(24)=65, how come at the end k=65/13 (note the difference in sign).

AssemblyRequired
Here's how I worked it out:
f(24)=772
=65
kf(2)=k(13)
=13k
65=13k
65/13=13k/13
5=k

mossy_oc
If you have a Casio calculator you can press mode 3 then put in the function and the range and it gives you the answer in a table

mossy_oc
If you're drawing a graph

mossy_oc
Of a function

joecole
Thanks, but it was just to solve for 'k'.

Me
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