Ohh true!! Do you have to know how to solve it using the graphical method tho? Thanks so much!! THIS IS SO HELPFUL!
More questions lool
1) Following 8 letters: AA BB CDEF
How many different 4 letter permutations can be formed?
2) attached (9 and 10 both)
All letter combination questions work exactly the same. First, as a general rule, if we want to choose four letters from eight letters, we can do this in
ways. However, where some of the letters are the same, we just divide be the factorial of the number of same letters that there are. Since there are two As, and two Bs, our answer will be
For the solutions to x=10cosx, sketch the function y=10cosx to scale. Then, on top of this, sketch the function y=x. The number of intersections are the number of solutions!
Now, we have
We know that P(x) is divisible by 2. Thus,
From here, you can just sub in the multiple choice answers and see which one works!