No its rational....................
Hello,
Use the factoration
a^2 - b^2 = (a - b)(a + b)
Then,
x^2 - 81 = x^2 - 9^2
x^2 - 9^2 = ( x - 9).(x + 9)
Then,
Lim (x^2- 81) /(x+9)
= Lim (x -9)(x+9)/(x+9)
Simplity x + 9
Lim (x -9)
Now replace x = -9
Lim ( -9 -9)
Lim -18 = -18
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The second method without using factorization would be to calculate the limit by the hospital rule.
Lim f(x)/g(x) = lim f(x)'/g(x)'
Where,
f(x)' and g(x)' are the derivates.
Let f(x) = x^2 -81
f(x)' = 2x + 0
f(x)' = 2x
Let g(x) = x +9
g(x)' = 1 + 0
g(x)' = 1
Then the Lim stay:
Lim (x^2 -81)/(x+9) = Lim 2x /1
Now replace x = -9
Lim 2×-9 = Lim -18
= -18
10-5y=1x
-10 -10
-5y= 1x -10
/-5 /-5
y= -1/5x +2
It is given in the question that, A commercial airline makes a flight each day from New York to Paris .
So in a week, the airline makes 7 flights .
And the aircraft seats 524 passengers, and serves 2 meals 2 each passenger per flight .
It means, for one passenger, one flight , aircraft serves 2 meals.
So for 524 passengers, 7 flights, aircraft serves
Each candy has a volume of about 8.18 * 10^-3 which is simplified to .00818
