`[((-4)/(7))+(1)/(4)]+([7]/[-16])-([-4]/[7])+[(1)/(4)+((7)/(-16))]`

((4)/(7))^(2)times((4)/(7))^(2)

The value of tan[cos^(-1)((4)/(5))+tan^(-1)((2)/(3))] is (6)/(17) (b) (7)/(16) (c) (16)/(7) (d) none of these

((1)/(1.4 )+ (1)/(4.7 ) +(1)/(7.10 )+(1)/(10.13 )+(1)/(13.16)) is equal to

((1)/(1xx4)+(1)/(4xx7)+(1)/(7xx10)+(1)/(10xx13)+(1)/(13xx16))=?

(1)/(2)+(3)/(2).(1)/(4)+(5)/(3).(1)/(8)+(7)/(4).(1)/(16)+....=

Divide :(-7)/(8)by(-21)/(16) (ii) (7)/(-4)by(63)/(64) (iii) 0 by (-7)/(5)

(-4/7)^2xx(-7/2)^4

(1)/(1*4*7)+(1)/(4*7*10)+(1)/(7*10*13)+