Solving Limits - Questions on x^(sinx) & (9^x)/(8^x)

  • Thread starter Thread starter mad
  • Start date Start date
  • Tags Tags
    Limit
AI Thread Summary
The limit of x^(sinx) as x approaches 0 from the positive side is confirmed to be 1. For the second limit, (9^x)/(8^x) simplifies to (9/8)^x, which is greater than 1. As x approaches infinity, (9/8)^x diverges to infinity since the base is greater than 1. Understanding the behavior of exponential functions based on their bases is crucial for solving such limits. The discussion emphasizes the simplicity of these limit calculations when the properties of exponents are applied correctly.
mad
Messages
65
Reaction score
0
Hello, I have two questions concerning limits

1) lim x-> 0+ x^(sinx)
2) lim x-> +inf. (9^x)/(8^x)

The first one gives me 1 (e^0 = 1) .. is that correct?
The 2nd one I don't know how to do. Can someone please explain the 2nd one for me?
Thanks a lot
 
Physics news on Phys.org
1) Correct

2) (9^x)/(8^x) = (9/8)^x and 9/8 > 1. How does a^x behave if a<1, a=1, a>1 ?
 
Gokul43201 said:
1) Correct

2) (9^x)/(8^x) = (9/8)^x and 9/8 > 1. How does a^x behave if a<1, a=1, a>1 ?


I knew it was that simple! Thanks for the help :)
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
Back
Top