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tanya : h max = ___?
Jawab :
Cari t = ___? agar h max
dengan turunkan h' = 0
h(t) = 60t - 5t²
h' = 60 - 10t = 0
t = 6 detik
kemudian masukkan t = 6 detik ke persamaan h = __?
h(t) = 60t - 5t²
h(6) = 60.(6) - 5.(6)²
h(6) = 360 - 5.(36)
h(6) = 360 - 180
h max = 180 meter