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Find the intervals in which the function f given by `f(x)=2x^2-3x`is(a) strictly increasing (b) strictly decreasing

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`f(x) = 2x^(2) - 3x`
`rArr f'(x) = 4x -3`
Let ` f'(x) = 0`
` rArr 4x-3 - 0 rArr x = 3/4`


(a) f(x) is strictly increasing in `(3/4, infty)`
(b) f(x) is strictly decreasing in `(-infty,3/4)`
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