Maths doubt

[shashank gadia]

View attachment 41091 For the last step, i will add pi too.


so now acc to ms, my radius shud be nine but i am getting 9.8. plz show steps..........

243∏=(4∏r^2)/2+∏r^2
243∏=3∏r^2
r=9

v=4/6*∏r^3
=486∏

 

[shashank gadia]

View attachment 41111 The b part.............

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

a^2 + b^2 = (a+b)^2 -2ab
= 6^2 - 2*7
=22

 

[shashank gadia]

View attachment 41112 The d part...........

f^(-1)(x)=(x-3)/2
f^(-1)(5)= 1
f(1) =5

 

[shashank gadia]

View attachment 41125

How......................??

the is one property
a^2 - b^2 = (a-b)(a+b)
hence
(a^(1/2)+b^(1/2))(a^(1/2)-b^(1/2))=a^(1/2*2)+b^(1/2*2)
= a+b

 

[shashank gadia]

View attachment 41135

Solve this n show

bases are same therefore power adds up
hence
=(3/8)^(4/8)
=(3/8)^(1/2)

 

[shashank gadia]

View attachment 41136




how to find the median?

125/2=62.5
this means it would be average of 62th and 63th number
62th and 63th number would come in range 2
and hence mediam is 2

 

[shashank gadia]

View attachment 41137


how .............?

p and q both at x axis therefore y=0
hence x in one case is -4 and in other is 6
both on x axis therefore difference is 10 giving u the distance

 

[Saly Elkady]

Ameena Eesa in which grade are u?