Question

log7 1/343

Answer 1

@BooBoo9512 Can you find the answer for this?
\[7^x=343\]
What power 7 has to be raised to get 343?

Answer 2

3

Answer 3

Good, so what's the value of
\[7^{-3}\]

Answer 4

0.002915452.... Im not sure

Answer 5

\[7^{-3}=\frac 1 {7^3}\]

Answer 6

oh my gosh, i forgot. but then to solve that what do i have to do

Answer 7

so
\[\log_7 {\frac 1 {343}}=\log_7 \frac{1}{7^3}=\log_7 7^{-3}\]
Can you solve now?

Answer 8

-49?

Answer 9

Do you know how log is defined?

Answer 10

what do you mean?

Answer 11

\[y=\log_x a\]
so what's a here?

Answer 12

i have no idea

Answer 13

This means that
\[a=y^x\]
so if you have
\[2^3=4\]
that means
\[\log_2 8 =3\]

Answer 14

ok so thats like \[logB^7 = T\] and \[B^T = 7\]

Answer 15

7 should not be the power of B, but B = base here

Answer 16

then thats why I'm confused with this problem because thats exactly what the teacher wrote on the board

Answer 17

Your question is correct. I meant that log is defined as
\[a=\log_b x=> b^a =x\]

Answer 18

the question says \[\log7 \frac{ 1 }{ 343 }\] but i dont understand what im supposed to do

Answer 19

If you have a question , find the value of
\[\log_ b a \]
We need to find the power b has to be raised to get a, here you need to find the power 7 has to be raised to get 1/343

Answer 20

wait. so the answer is -3?

Answer 21

yes sir

Answer 22

(ma'am) and THANK YOU :0)

Answer 23

can i ask one last question please?

Answer 24

post it as a new one

Answer 25

ok thank you

Answer 26

ummmmm, .... how do i post a new question?

Answer 27

close this and post a new one