5+y+z I think x Something like that.
Answer:
25:64
Step-by-step explanation:
surface : 4×pi×R^2
R1 = 5x
R2 =8x
4piR1^2 / 4piR2^2 = R1^2/R2^2 = 5x^2/8x^2 = 25x^2/64x^2 = 25/64
Answer:
x-1
Step-by-step explanation:
Djdhdhhdjdjsndndndjdjddnjdnddndndndnnddnndndjsjsdnjd
Solution :
We have been given a parametric curve :
x = sin t , y = cos t , 0 < t < π
In order to determine concavity of the given parametric curve, we need to evaluate its second derivative first.
Therefore,



Taking double derivatives of the above equation:




For the concave up, we have


∴ 
For the concave down, we have


