Answer:
7
Step-by-step explanation:
form a proportion
12/2=42/x
cross multiply
12x=84
x=7
Answer:
Step-by-step explanation:
Hello, first, let's use the product rule.
Derivative of uv is u'v + u v', so it gives:
Now, we distribute the expression of f(x) and find the derivative afterwards.
Hope this helps.
Do not hesitate if you need further explanation.
Thank you