Math For you guys!!!!

~~coryallen2~~ · 04-22-2009, 08:36 AM

Lets see who can do this stuff =] (good luck)

1. If 1/2x +1/2(1/2x + 1/2(1/2x +1/2(1/2x + ... = y,
then x = ?

2. y = log x
If y = 10, then what is x?

3. 10*9*8*7*6*5*4*3*2*1 = 10!
Can this be true?! Why or why not?

HAVE AT IT GUYS!!!!

ANSWERS!!!!

1. If x = 1,
then the equation likes this:
1/2 +1/2(1/2 + 1/2(1/2 +1/2(1/2 + ... = y
1/2 +1/4 + 1/8 + 1/16 + 1/32 + ... = y
y = 1 = x
y = x

2.y = log x
10 = log x
10 = 10^x
x = 1

3.Yes!!!
The expression "x!" means x(x-1)(x-2)(x-3)...1
So 10! means 10(10-1)(10-2)(10-3)(10-4)(10-5)(10-6)(10-7)(10-8)(10-9)=
10*9*8*7*6*5*4*3*2*1=10!,
which means it is correct.

Highlight for answers good luck!

04-22-2009, 08:36 AM	#1 (permalink)
~~coryallen2~~ Account Disabled Join Date: Feb 2009 Location: lorain,ohio Posts: 909	Math For you guys!!!! Lets see who can do this stuff =] (good luck) 1. If 1/2x +1/2(1/2x + 1/2(1/2x +1/2(1/2x + ... = y, then x = ? 2. y = log x If y = 10, then what is x? 3. 10987654321 = 10! Can this be true?! Why or why not? HAVE AT IT GUYS!!!! ANSWERS!!!! 1. If x = 1, then the equation likes this: 1/2 +1/2(1/2 + 1/2(1/2 +1/2(1/2 + ... = y 1/2 +1/4 + 1/8 + 1/16 + 1/32 + ... = y y = 1 = x y = x 2.y = log x 10 = log x 10 = 10^x x = 1 3.Yes!!! The expression "x!" means x(x-1)(x-2)(x-3)...1 So 10! means 10(10-1)(10-2)(10-3)(10-4)(10-5)(10-6)(10-7)(10-8)(10-9)= 10987654321=10!, which means it is correct. Highlight for answers good luck!