Gemini

I have a Q that im trying to solve: it says: the 1st , 2nd, and 3rd term of a geo. sequence is the same as the 1st, 7th and 9th terms of an arith. sequence.: I have to find the common ratio. So i know: a+8d = a(r^2) (1) a+6d = ar (2) but i don't know how...

the Q is : Given that (1+ax)^n = 1 + 30x +375x^2+.... find the values of the constants a and n . I know that : (i am writing (n 1) as the coefficient of n) (n 1) *ax = 30x (n 2) *(ax)^2 = 375x^2 which can be written as (n 1)* a = 30 (n 2)*a^2 = 375 I solv...

here is my take: you know that x^-1 = 1/x so in the denominator you have (a^-1) - (b^-1) = 1/a - 1/b you need to have the same denominator, which you get by multiplying both in the numerator and denominatorby the other fraction's denominatior so you get:...

i assume it is read like this: [27/(5+4)] * 19 which is (27/9) * 19 <=> 3*19 = 57

yes she is. and then 2 yellow/ 6 green and so on.

the options available are rather odd. you want to see if the length has any influence on the time. this you do by testing different lengths and trying to keep the weight the same. My guess would be the last one 2+5, as the lengths are different and the we...