Writing an expression to a power with positive exponents.

**gideonrichter** · February 29th 2012, 06:16 PM

Can someone explain to me why...
x^7/2 x (x) = x^9/2 ?

**princeps** · February 29th 2012, 11:53 PM

Originally Posted by gideonrichter

Can someone explain to me why...
x^7/2 x (x) = x^9/2 ?

$x^a \cdot x^b=x^{a+b}$

**Wilmer** · March 1st 2012, 01:23 PM

Originally Posted by gideonrichter

Can someone explain to me why...
x^7/2 x (x) = x^9/2 ?

Please use * for multiplication sign...plus brackets when necessary:
x^(7/2) * x^1 = x^(7/2) * x^(2/2) = x^(7/2 + 2/2) = x^(9/2)

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