C'mon solve these mathe's questions.........?

{1} I f !z+4!%26lt;or=3 then maximum value of !z+1! is::


:a) 4


:b) 10


:c) 6


:d) 0





{2} If a line makes an angle of 45* with positive direction of each of x-axis, then the angle that the line makes with positive direction of z-axis is::


a) 30*


b) 60*


c) 45*


d) 90*





{3} If there is a matrix "D" containing C11,C12,C13,C21,C23,C31,C32=1 %26amp; C22=1+x , C33=1+y i.e the given matrix is (3X3)


for [x,y not equal to 0] then "D" is::


a) divisible by niether "x" nor "y"


b) divisible by both "x" %26amp; "y"


c) divisible by "x" but not "y"


d) divisible by "y" but not "x"





{4} Let there be a matrix of (3X3) containing it's elements as C11, C33=5 %26amp; C21,C31,C32=0 %26amp; C12,C23=5b %26amp; C13,C22=b


If !AXA!=25, then !b!=?


a) 25


b) 1


c) 1/5


d) 5

C'mon solve these mathe's questions.........?
Hard to understand your spelling, but I'll try.





{1} If z!+4! %26lt; or = 3


if z = -3 you'll have: (-3x-2x-1)+4 = - 2 %26lt; 3





z! + 1!


a) z! = 3 wrong


b) z! = 9 wrong


c) z! = 5 wrong


when z = -1; z! + 1 = 0 right





{2}


Any line on the plan (x,y) will make a 90º angle with z axis.





{3} If there is a matrix "D" containing C11,C12,C13,C21,C23,C31,C32=1 %26amp; C22=1+x , C33=1+y i.e the given matrix is (3X3)


[x,y not equal to 0]


But it may be [x = y]


Te answer is:


b) may be divisible by both "x" %26amp; "y"





{4}


b = 1
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