(-7)+(-9)+4+16=

(-7) + (-9) + 12 + (-16) = ?

Simplify : [ ((- 3 )/( 2) xx (4)/(5) ) + ((9)/(5) xx (-10)/( 3)) - ((1)/(2)xx (3)/(4)) ] div [ ((21)/( 9) xx (3)/(7)) +((7)/(8) xx (16)/(14)) ]

Sum of infinite terms of the series 1 + 4/7 + (9)/(7^2) + (16)/(7^3) + (25)/(7^4) +……, is

(7)/(2)+(9)/(16)=

4, 7, (9), 10, 13, 15, (16), 19

The Value of (-7)/16-((-9)/20)=

In a triangle A B C , if a : b : c=4:5:6 , then ratio between its circumradius and inradius is (16)/7 (b) (16)/9 (c) 7/(16) (d) (11)/7