1. Solve the equation 2sin^2@ + 7sin@ + 3 = 0, where 0 =/< @ =/< 360.
2. Let f(x)=x^3+kx^2-kx+4, where k is a constant. If f(x) is divisible by x-2, find the remainder when f(x) is divided by x-4.
I suspect that the answers provided are wrong, so I'm posting the questions here. Thanks!!! :)1 個解答數學1 十年前
if -3 is a root of the equation x^2+(13+k)x+k=0, find
a) the value of k
b) the other root of the equation.
Thanks :)3 個解答數學1 十年前
A man with mass 70kg is is bungy jumping from 200m above a river. Length of cord used is 50m
1 Calculate the velocity when the cord is just stretched
2 The man stops when he just reached river, calculate the extension and the energy stored by the elastic cord
3 Given that energy stored in the cord =(1/2)kx^2, k is the force constant of cord and x the extension of cord (force constant=force per unit extension) Find:
ii) acc. of the man the moment when he reaches water1 個解答其他 - 科學1 十年前
c of water =4200, l=2.26x10^6
a) Calculate the energy neeed to generate 500g of steam from the water at 25C.
b) input of power is 600W. effeiciency of steamer is 75%. find the min. time to generate 500g of steam from water at 25C.
c) cost of electricityis $0.85 per kWh, caculate the cost to generate 500g of steam from water at 25C, using the result from (b).
Thanks! :)1 個解答其他 - 科學1 十年前
在 198話中,Sailor Uranus 和 Sailor Neptune 都死了.
為何Sailor Uranus 和 Sailor Neptune會曾經被認為是背叛者?
她們又真的曾出賣過 Sailor Moon等人嗎?
第四部分1 個解答漫畫及動畫1 十年前