Consider the function h(x)= e^ 5x^ 2 +4 for all real numbers .

MATHEMATICS · Multi-part · AP · Calculus AB · Limits and Continuity · Limits and Continuity

Problem

Consider the function h(x)=e5x2+4h(x)=\sqrt{e^{5x^{2}}+4} for all real numbers xx. (a) Calculate lim⁡x→1h(x)\displaystyle \lim_{x\to1} h(x). (b) Write hh explicitly as a composition of three simpler elementary functions. For each component function, indicate the value at which it is evaluated when x=1x=1. (c) Justify in words why the limit in part (a) can be found by direct substitution, making specific reference to the continuity of each component identified in part (b).

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