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\[(x/4 - 1/x)/[1/(2x) + 1/4]\]

ok..

x-2

First multiply denominator and numerator by 4x.
You will obtain (x^2 - 4)/(x+2)

and then x+2 cancel out right?

Expand the numerator to get (x+2)(x-2)/(x+2)

Sure

f(x)=1/27-3^x for which value is x undefined?

When x is not equal to 3

whenever the denominator equals zero, so at x = 3

solve for x: log small 8 (x+1)=2/3

Raise both sides to the 8

sorry i had to leave... others helped anyway

The cube root of 8 is 2; 2-squared is 4

So , x+1 = 4

x = 3

write the full expansion of (3x+2)^4

That may take a while. You know about pascal's triangle right?

yeah i think i got the answer anyways i will give you another problem

Between what two values does 68.2% of the distribution lie?

You have any problems not related to statistics? Or these are the only ones?

these are the only ones