Question

A large number of disease-free individuals were enrolled in a staly beginning Jammary 1, 1980, and where followed for 30 year to assess the age at which they developed breast cancer. individuals had clinical examinations every three years after enrollment. For four selected individuals described below, identify the type of censoring and truccation that are represented. a) A healthy individual, enrolled in the study at age 30, never developed breast cancer during the study b) A hithy individual, enrolled in the study at age 10, was diagnosed with breast cancer at the fifth examination after enrollment (the disease started sometimes between 12 and 15 years after enrollment). 13 3 e) A healthy individual, enrolled in the study at age 50, dies in a car accident at age 61. d) An individual, enrolled in the study at age 12, maved away from the community at age 55 and never diagnosed with breast cancer during the period of observation. 3 QUESTION​

Answer 1

Answer:

x/2=x/2x+1 or,x/2-1/2x=1 or,x-1/x=2 now,x3-(1/x)3=(x-1/x)3+3.x.1/x(x-1/x)=(2)3+3×2=8+6=14