easy

swetpear087 said:
I need to set to K=

T= 2pi times the square root of k/m

You need to use parenthesis to indicate whether this is...
\(\displaystyle T=2\pi\frac{\sqrt{k}}{m}\) or \(\displaystyle T=2\pi\sqrt{\frac{k}{m}}\)

As typed it means the former.
 
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