Posted by **Ashley** on Tuesday, January 29, 2013 at 8:26am.

The voltage in a circuit is given by the formula V = 16t3 - 79t. Find the values for t for which V is a maximum or a minimum.

larger t in seconds =

smaller t in seconds =

My Answer:

V=16t^3-79t

V'=48t^2-79

0=48t^2-79

Sq root of 1.645833 = t

1.2829= t

V''=96t positive therefore a min

Larger t = 1.2829

smaller t = -1.2829

Can you please confirm this is correct.

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