Ban. M QB Int. 49

UR friend is rite, not a wierd assumptn.....

its coz x ranges frm 10 to 19.....

u take the lowest value of x = 10

1/x^8 = 1/10^8

nice way 2 solve MCQs..... helpful technique

EVEN IF U DONT TAKE THE ASSUMPTION IT WORKS WELL....

\int_{10}^{19}{x^{-8}} = x^-7/-7 on the limits 10 n 19

now solv further, BUT UR METH IS BETTER

chalo isi bahane mjhe ek aur nayi baat pata chal gayi.......[1]

BINGO THE RIGHT ANSWER! GREAT WORK DUDE!!!!!!!!!!
THANKS TAPAN.....