question 98

Short Answer

$\text { Use the graph of } f ( x ) = \frac { \sin 4 x } { \tan 5 x } \text { to guess at the limit } \lim _ { x \rightarrow 0 } \frac { \sin 4 x } { \tan 5 x } \text {, if it exists. }$

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Definitions:

Cyclic Pathway

A biochemical route characterized by a series of reactions where the final product regenerates the initial reactant.

Electron Transport System

A series of complexes that transfer electrons through a membrane within mitochondria or chloroplasts to generate a gradient for ATP production.

ATP

Adenosine triphosphate, a molecule that provides energy for many processes in living cells by being converted to ADP (adenosine diphosphate).

NADPH

Nicotinamide adenine dinucleotide phosphate, a coenzyme involved in anabolic reactions, such as lipid and nucleic acid synthesis, acting as a reducing agent.