S = 5t² - 4t + 7√t
V(t) = S'(t) = 5(t²)' - 4(t)' + 7(√t)' = 10t - 4 + 7/2√t
V(4) = 10 * 4 - 4 + 7/2√4= 40 - 4 + 1,75 = 37,75
a(t) = V'(t) = 10(t)' - 4' + (7/2√t)'= 10 - 7/(4t√t)
a(4) = 10 - 7/32 = 10 - 0, 21875 = 9,78125
ответ : V(4) = 36 ; a(4) = 9,78125
S = 5t² - 4t + 7√t
V(t) = S'(t) = 5(t²)' - 4(t)' + 7(√t)' = 10t - 4 + 7/2√t
V(4) = 10 * 4 - 4 + 7/2√4= 40 - 4 + 1,75 = 37,75
a(t) = V'(t) = 10(t)' - 4' + (7/2√t)'= 10 - 7/(4t√t)
a(4) = 10 - 7/32 = 10 - 0, 21875 = 9,78125
ответ : V(4) = 36 ; a(4) = 9,78125