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# 1.Write a loop that calculates 12-factorial

factorial = 1
for (i in 12:1)
{factorial=factorial*i}
print(factorial)
##  479001600

# 2. Show how to create a numeric vector that contains the sequence from 20 to 50 by 5.

numvec<-seq(20,50, by=5)
numvec
##  20 25 30 35 40 45 50

# 3. Create the function “factorial” that takes a trio of input numbers a, b, and c and solve the quadratic equation. The function should print as output the two solutions

factorial<-function(a, b, c)
{
x1=(-b+(b^2 - 4*a*c)^(1/2))/(2*a)
x2=(-b-(b^2 - 4*a*c)^(1/2))/(2*a)
print(x1)
print(x2)
}
factorial(2, 7, 4)
##  -0.7192236
##  -2.780776