compare the functions f(x)=2^x and g(x)=4x^3 by completing parts (a) and (b). (a) fill in the table below…

compare the functions f(x)=2^x and g(x)=4x^3 by completing parts (a) and (b). (a) fill in the table below. note that the table is already filled in for x = 5. (the aleks calculator can be used to make computations easier.) x f(x)=2^x g(x)=4x^3 5 32 500 6 13 14 15 (b) for x≥6, the table suggests that f(x) is (choose one) less than g(x). (choose one) always sometimes never
Answer
Explanation:
Step1: Calculate $f(6)$
Substitute $x = 6$ into $f(x)=2^{x}$, so $f(6)=2^{6}=64$.
Step2: Calculate $g(6)$
Substitute $x = 6$ into $g(x)=4x^{3}$, so $g(6)=4\times6^{3}=4\times216 = 864$.
Step3: Calculate $f(13)$
Substitute $x = 13$ into $f(x)=2^{x}$, so $f(13)=2^{13}=8192$.
Step4: Calculate $g(13)$
Substitute $x = 13$ into $g(x)=4x^{3}$, so $g(13)=4\times13^{3}=4\times2197 = 8788$.
Step5: Calculate $f(14)$
Substitute $x = 14$ into $f(x)=2^{x}$, so $f(14)=2^{14}=16384$.
Step6: Calculate $g(14)$
Substitute $x = 14$ into $g(x)=4x^{3}$, so $g(14)=4\times14^{3}=4\times2744 = 10976$.
Step7: Calculate $f(15)$
Substitute $x = 15$ into $f(x)=2^{x}$, so $f(15)=2^{15}=32768$.
Step8: Calculate $g(15)$
Substitute $x = 15$ into $g(x)=4x^{3}$, so $g(15)=4\times15^{3}=4\times3375 = 13500$.
Step9: Analyze the relationship for $x\geq6$
By observing the values in the table for $x = 6,13,14,15$, we can see that sometimes $f(x)<g(x)$ and sometimes $f(x)>g(x)$.
Answer:
| $x$ | $f(x)=2^{x}$ | $g(x)=4x^{3}$ |
|---|---|---|
| 6 | 64 | 864 |
| 13 | 8192 | 8788 |
| 14 | 16384 | 10976 |
| 15 | 32768 | 13500 |
| (b) sometimes |