Question

3 = log_x(216)

Answer 1

\[log_b u =a \]means that \[b^a=u\]

Answer 2

That means \[x^3=216\]

Answer 3

Can you find a number \(x\) such that \(x*x*x =216\)? Hint: it is an integer, so you could just start at \(1\) and try out \(1*1*1=1, \,2*2*2=8, \) etc.

Answer 4

thank you so much really helped me :)

Answer 5

notice that 10*10*10= 100*10 = 1000
so the answer is definitely less than 10

Answer 6

@phi makes an excellent point — often very handy to be able to get a sense of what reasonable values are for the answer!