Mathematics
If (x + 5) is the geometric mean between (x + 2) and (x + 9), find the value of x.
Related Questions
If (x − 2), (x + 2), (2x + 1) and (2x + 19) are in proportion, find the value of x.
The following numbers, K + 3, K + 2, 3K − 7 and 2K − 3 are in proportion. Find the value of K.
Find two numbers whose mean proportion is 36 and the third proportional is 288.
If a : b :: c : d, prove that :
(i) (a2 + ab) : (c2 + cd) = (b2 − 2ab) : (d2 − 2cd)
(ii) (a2 + b2) : (c2 + d2) = (ab + ad − bc) : (cd − ad + bc)
(iii) (a2 + ac + c2) : (a2 − ac + c2) = (b2 + bd + d2) : (b2 − bd + d2)