If s = (2 + 3t)(5t - 4), find \( \frac{dy}{dx} \) when t = \( \frac{4}{5} \) sec

Assessment: JAMB UTME - Mathematics - 2009 Subject: General Mathematics

Question 1 Report

If s = (2 + 3t)(5t - 4), find \( \frac{dy}{dx} \) when t = \( \frac{4}{5} \) sec

Answer Details
s = (2 + 3t)(5t - 4), find  d y d x  when t =  4 5  sec
= 10t - 8 + 15t2 - 12t
d s d t  = 15t2 - 2t - 8
= 30t - 2 ; t =  4 5
= 30t - 2
= 30 x  4 5  - 2  →  24 - 2
= 22 sec

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