1。The number of random numbers it takes to add up to 20 (or more).
2。Let A=[2 -2 1; 4,-3,-1; -6, 7, -6] and b=[1; -2; 2*t-1], where t is a real
number. For which value of t does the system of linear equation Ax=b has a so
lution? Write a script file to find the t
想很久都想不出來 跪求解~~~