mutinta

in the binomial expansion of (1+x/k)^n, where k is a constant and n is a positive integer, the coefficients of x and x^2 are equal. (a) show that 2k=n-1 (b) deduce the value of k. Hence find the 1st 3 terms in the expansion in ascending powers of x.

a child and a sled weighed 290N slide down an ice covered hill that is 10m high. at the bottom of the hill there is an free ice, rough horizontal surface that brings the sled to stop within a distance of 25m. what is the coefficient of fiction between the...