Application of DerivativeMedium
Question
The length of the sub tangent at any point of the curve y = ax3 is-
Options
A.x
B.x/3
C.x/a
D.ax
Solution
Equation of curve y = ax3
Length of subtangent = y1 ×
= 3ax2 
= 3ax21
length = y1 ×
Length of subtangent = y1 ×
= 3ax2 = 3ax21length = y1 ×
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