Thread: Basic Logirithms & Basic expanding the brackets

Hello everyone,

I need help with logarithms that are in fraction form.

such as
evaluate the following for x:


log ^ 2 x = 1/7

log ^ 2 x = 1/5

log ^ 2 x = 2/7


I also need to be sure if expanding this equation for e.g is correct?

expand the following:

(a + b) (a + b + c)

a^2 + ab + ac + ba + b^2 + bc

& do I plus the powers or times them in the brackets?


expand the following:


(a^2 + b^2) (a^3 + b^3 + c^2)

a^5 + a^2b^5 + a^2c^2 + b^2a^3 + b ^ 5 + b ^2c^ 2

evaluate the following for x

You must mean "solve the following for x" ? If yes, then :










But maybe I don't understand what you wrote, try using the LaTeX editor ?

Originally Posted by student0451

Hello everyone,

I need help with logarithms that are in fraction form.

such as
evaluate the following for x:


log ^ 2 x = 1/7

log ^ 2 x = 1/5

log ^ 2 x = 2/7


I also need to be sure if expanding this equation for e.g is correct?

expand the following:

(a + b) (a + b + c)

a^2 + ab + ac + ba + b^2 + bc

& do I plus the powers or times them in the brackets?


expand the following:


(a^2 + b^2) (a^3 + b^3 + c^2)

a^5 + a^2b^5 + a^2c^2 + b^2a^3 + b ^ 5 + b ^2c^ 2

1. Do you mean

or ?


2. Collect your like terms

i am so sorry about my typing,

http://www.mathhelpforum.com/math-he...6f55baf4-1.gif

it is the base of 2

log 2 x = 1/7

so 2 is the base of the log


and thank you for helping me.

Then it becomes (I think) :




When writing indicators, use the underscore char, it is much more appropriate : log_2(x).

Originally Posted by student0451

i am so sorry about my typing,

http://www.mathhelpforum.com/math-he...6f55baf4-1.gif

it is the base of 2

log 2 x = 1/7

so 2 is the base of the log


and thank you for helping me.

yep

and thank you, vondera19 & Bacterius.

I knew there was something wrong between the way I expanded brackets.