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Function notation: Next we have to take a rapid look at function notation. Function notation is nothing more than way of writing the y in a function which will let to simplify notation and some of our work a little.
Let's take a look at the given function.
y = 2 x2 - 5x + 3
Using function notation we can write this as any of the following.
f ( x ) = 2x2 - 5x + 3 g ( x ) = 2 x2 - 5x + 3
h ( x ) = 2 x2 - 5x + 3 R ( x ) = 2 x2 - 5x + 3
w ( x ) = 2 x2 - 5x + 3 y ( x ) = 2 x2 - 5x + 3
Remember again that it is not a letter times x, it is just a fancy way of writing y. hence, why is this useful? Well let's take the function above & get the value of the function at x=-3. By using function notation we represent the value of the function at x=-3 as f(-3). Function notation provides us a nice compact way of representing function values.
Now, how do we in fact evaluate the function? That's actually simple. Everywhere we illustrate an x onto the right side we will substitute whatever is in the parenthesis on the left side. For our function it gives,
f ( -3) = 2 ( -3)2 - 5 ( -3) + 3
= 2 (9) + 15 + 3
= 36
If ABC is an obtuse angled triangle, obtuse angled at B and if AD⊥CB Prove that AC 2 =AB 2 + BC 2 +2BCxBD Ans: AC 2 = AD 2 + CD 2 = AD 2 + (BC + BD) 2 = A
Find out primes of each denominator: Add 1/15 and 7/10 Solution: Step 1: Find out primes of each denominator. 15 = 5 x 3 10 = 5 x 2 Step 2:
1/(1-z)(1-z)(1-z)(1-z)
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