Answer:
(a) 
(b) 
Step-by-step explanation:
The given function is
.... (1)
According to the first principle of the derivative,






Cancel out common factors.

By applying limit, we get


.... (2)
Therefore
.
(b)
Put x=2, to find the y-coordinate of point of tangency.

The coordinates of point of tangency are (2,0.25).
The slope of tangent at x=2 is

Substitute x=2 in equation 2.

The slope of the tangent line at x=2 is -0.25.
The slope of tangent is -0.25 and the tangent passes through the point (2,0.25).
Using point slope form the equation of tangent is





Therefore the equation of the tangent line at x=2 is y=-0.25x+0.75.
Answer:
The value of A is 5
Step-by-step explanation:
- The number is divisible by 3 if the sum of its digits is a number
divisible by 3
- Ex: 126 is divisible by 3 because the sum of its digits = 1 + 2 + 3 = 6
and 6 is divisible by 3
- The number is divisible by 5 if its ones digit is zero or 5
- Ex: 675 is divisible by 5 because its ones digit is 5
890 is divisible by 5 because its ones digit is 0
- We are looking for the value of A in the 4-digit number 3A5A which
makes the number divisible by both 3 and 5
∵ A is in the ones position
∴ A must be zero or 5
- Let us try A = 0
∵ A = 0
∴ The number is 3050
∵ The sum of the digits of the number = 3 + 0 + 5 + 0 = 8
∵ 8 is not divisible by 3
∴ 3050 is not divisible by both 3 and 5
∴ A can not be zero
- Let us try A = 5
∵ A = 5
∴ The number is 3555
∵ The sum of the digits of the number = 3 + 5 + 5 + 5 = 18
∵ 18 is divisible by 3
∴ 3555 is divisible by both 3 and 5
∴ A must be equal 5
* <em>The value of A is 5</em>
Answer:d=18FT
Step-by-step explanation:
YOUR WELCOM :)
The answer is 15
Since 20 times 7 is 140 and 140+75 is 215
Take 215-200 you get 15
Answer:
yes
Step-by-step explanation:
yes