Extract the square root of [13/4]^4 - [13/3]^4 / [13/4]^2 - [13/3]^2
a)65/12
b)77/12
c)78/12
d)113/12
e)none
a)65/12
b)77/12
c)78/12
d)113/12
e)none
[13/4]^4 - [13/3]^4 / [13/4]^2 - [13/3]^2pullagurla wrote:Extract the square root of [13/4]^4 - [13/3]^4 / [13/4]^2 - [13/3]^2
a)65/12
b)77/12
c)78/12
d)113/12
e)none
=[13/4]^4 - [13/3]^4 * ([13/4]^2 + [13/3]^2) / [13/4]^4 - [13/3]^4 [Multiply and div by ([13/4]^2 + [13/3]^2) ]
=([13/4]^2 + [13/3]^2)
=13^2 (1/16 + 1/9)
=13^2(25/16*9)
sqrt= 13(5/3*4)=65/12
pick A
