21. Paula casts a shadow 2 meters long at the same time a tree casts a shadow 28 meters long. The tree is 17.smeters tall. How t
all is Paula?A. 1.25 metersD. 2.8 metersB. 1.75 metersC. 2.5 meters
1 answer:
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Answer:
a.y'=-1
b.y'=-1
c.Yes
Step-by-step explanation:
We are given that consider a function
Implicit function: That function is a relation in which dependent variable can not be expressed in terms of independent variable
Explicit function: It is that function in which dependent variable can be expressed in terms of independent variable.
a.
Differentiate w.r.t x then we get
b.
Differentiate w.r.t x then we get
When we substituting the value of y obtained from part b into a solution of part a then we get
Hence, solutions are consistent.