Math, asked by ayushsharma7049, 1 year ago

Short Ans type
Q9
Q5
Q8

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Answered by MrsJUNGKOOK
1
what PDF is this dear plz give that link clearly
Answered by taibhave
0

(Ans 5)  a^(-1)/(a^(-1)+ b^(-1) ) + a^(-1)/(a^(-1)- b^(-1) )  =   (1/a)/(1/a  + 1/b) + (1/a)/(1/a  - 1/b)  

                              =   (1/a)/(b/ab  + a/ab) + (1/a)/(b/ab  - a/ba)

                              =  ( 1/a x ab/(a+b) ) +  ( 1/a x ab/(b-a) )

                             =  ( (b(b-a)+b(a+b))/((a+b)(b-a)) )

                            = ( (b^2-ab+ab+  b^2)/((a+b)(b-a)) )

                            =  ( (2b^2)/((a+b)(b-a)) )

                           =  ( (2b^2)/((b^2- a^2)) )

(ans8) and (ans 9) will upload soon...


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