The coefficients of three consecutive terms in the expansion of 1 an are in the ratio 1:7:42 .Find ‘n’ and ‘r’.
The coefficients of three consecutive terms in the expansion of 1 an are in the ratio 1:7:42 .Find ‘n’ and ‘r’.
In the adjoining figure, AP BQ CR. Prove that ar (∆AQC) = ar (∆PBR).