yasbib555

thank you so much too!!! 

thank you so much!!

I got f(0)=4+sqrt(5)

Thank you but is it possible to show me how you have arrived at that answer? 

Another quick way is if you have a calculator/are allowed one, you can see which tan^(-1) corresponds to. For example, mine is yellow and above the "tan" function and so is my shift button. So if I click shift and then the tan button, I can input my value and it will be automatically calculated when I press "=." 

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There are 7 possibilities (A~G) for the first letter, 7 for the second, and 7 for the third. Multiplying this together, we get 7^3=343 total ways to make a set of 3-letter initials. 

ahhh that makes sense thank you!! 

thank you so much!!

You go into "MY PROFILE" from the top right when you click on your username. From there, you will have your current profile picture on the top left. You can upload a picture from your device there. 

1. Is it possible to inform me on how these solutions are so obvious? 

2. My bad, I'm sorry, I fixed it though