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The FN key stands for function and then your f1 f2 ...... keys Also, in mathematics it stands for Fibonacci number, Fn. But you probably mean on the computer keyboard.
There is no hardware switch on the B130. To turn the radio on and off, press FN + F2.
hom to activate fn+f2 key
Try fn+F1 or maybe fn+F2 ---- Fn+F7
Function buttons (F1, F2, ... F10 etc.) are usually located in the top row of keys on your keyboard. Location may be different on different keyboards.
The first number, f1 = 1 The second number, f2 = 1 After that the sequence is defined recursively: fn = fn-1 + fn-2 for n=3, 4, 5, ...
The Fibonacci sequence has this form: Fn + 2 = Fn + 1 + Fn with these starting values F0 = 0 and F1 = 1. Find the 7th term via similar computation by substituting the values in! You should get... F2 = F1 + F0 F2 = 1 + 0 F2 = 1 F3 = F2 + F1 F3 = 1 + 1 F3 = 2 F4 = 3 F5 = 5 F6 = 8 F7 = 13 So the 7th term of the Fibonacci sequence is 13.
You need to hold the Function key (marked Fn) and then press F5 and F11 to use as function keys. This can be reversed in the Keyboard section of System Preferences by ticking the Use F1, F2 etc. as standard function keys option; the Fn key will then control the brightness and volume keys.
The Fn button is the function key. A key that works like a shift key to activate the second function on a dual-purpose key.
Fn - especially calculator or laptop is the key that accesses the other functions of certain keys depending upon keyboard manufactry i.e. holding down the Fn key whilst using the F2, F3 etc keys will, on sony laptop adjust volume - written in blue as is the Fn key, holding down the shift +Fn key will give you the function of the other coloured keys.
OK, say we have some functions, f1, f2, f3, f4, ..., fn. Lets assume that all of these functions take in a real input and give a real output, so we can write y=f1(x), where x,y are both real. Start with the composition of two functions (to establish notation): y2 = f2(f1(x)) --> dy2/dx = df2/dx(f1(x)) * df1/dx(x) in English: "The derivative of y2 with respect to x, evaluated at the point x, is equal to the derivative of f2 with respect to x, evaluated at the point f1(x), times the derivative of f1 with respect to x, evaluated at the point x." The composition of three functions: y3 = f3(f2(f1(x))) --> dy3/dx = df3/dx(f2(f1(x))) * df2/dx(f1(x)) * df1/dx(x) = df3/dx(y2) * dy2/dx For composition of n functions: yn = fn(fn-1(...(f2(f1(x)))...)) dyn/dx = dfn/dx(fn-1(...(f2(f1(x)))...)) * ... * df2/dx(f1(x)) * df1/dx(x) = dfn/dx(fn-1) * dyn-1/dx Here I used shorthand, so that fn-1 really means f_{n-1}, the "n-1"th function.
This is the famous fibonacci sequence, where each term in the sequence is the sum of the previous two. Fn=Fn-1 + Fn-2 F0 = 1 and F1 = 1 are the initial values to begin the sequence. F2 = F1 + F0 = 1 + 1 = 2 F3 = F2 + F1 = 2 + 1 = 3 and so on