178 divided by 456 multiplied by 219 divided by 178 multiplied by 456 divided by 219 178/456*219/178*456/219

178 divided by 456 multiplied by 219 divided by 178 multiplied by 456 divided by 219 178/456*219/178*456/219

Exchange order
(178/178)*(456/456)*(219/219)

98 times? = 888, 987 times? = 8888, 9876 times? = 88888

98*9+6=888
987*9+5=8888
9876*9+4=88888

4793-997

4793-997 = 4793 - (1000-3) = 4793-1000 + 3 = 3793 + 3 = 3796

Express the result in the form of power (- 2) to the power of 2009 + (- 2) to the power of 2010 = () urgent, now hurry up!

(-2)^2009+(-2)^2010
=-2^2009+2^2010
=2^2010-2^2009
=(2^2009)*2-2^2009
=2^2009(2-1)
=2^2009.

Given that f (1 − X1 + x) = 1 − X21 + X2, the analytic expression of F (x) is ()
A. f（x）=x1+x2B. f（x）=-2x1+x2C. f（x）=2x1+x2D. f（x）=-x1+x2

Let 1 − X1 + x = t, then x = 1 − T1 + T, ∧ f (T) = 1 − & nbsp; (1 − T1 + T) 21 + (1 − T1 + T) 2 = 2t1 + T2, ∧ f (x) = 2x1 + x2

The analytic expression of F (x 2-1) = x4-8

Let x2-1 = t
x2=t+1
f（t）=（t+1）^4-8
Because x2-1 = t = X
therefore
f（x）=（x+1）^4-8

Given f (x2-1) = 1 / x4, find f (x)
Given that f (x squared-1) = one fourth power of X, find f (x)
Can I set t = x2-1, then xsquare = t + 1, then f (x) = 1 / (x2) 2 = 1 / (T + 1) 2, that is, f (x) = 1 / (x + 1) 2, the domain of definition is x is not equal to - 1, can I solve it like this

The idea is correct, but pay attention to the domain
t=x2-1≥-1
And because on the denominator, I'm going to leave - 1
So the domain should be
x>-1

Given f (x + 1 / x) = x2 + 1 / x, find the analytic expression of F (x)

Your problem may not be that f (x + 1 / x) = x2 + 1 / X is one square less
It is estimated that:
f(x+1/x)=x2+1/x²
f(x+1/x)=x2+1/x²=（x+1/x)²-2
So f (x) = x & # 178; - 2

Given that f (1 + 1 / x) = x / 1-x2, find the analytic expression of F (x)

-（1/x2-x+1)

Given g (x) = 1-x, f [g (x)] = (1-x2) / X2 (x ≠ 0), what is f (1 / 2) equal to

Let's solve this g (x) = 1-x = 1 / 2
x=1/2
That is, G (1 / 2) = 1 / 2
That is, f (1 / 2) = f (g (1 / 2))
Substituting f [g (x)] = (1-x2) / x2
f（1/2）=f（g（1/2））=3