1Q 1) was easy dear! see..3x+4y+1=0
& x+y+3=0
solve and u get a point!
so a is the ans
1) (3x+4y+1)2 +(x+y+3)2= 0 represents?
a) a point
b) a piar of straight lines
c) an ellipse
d) a hyperbola
2)ammonia can be ried by:-
a) conc. H2SO4
b)P4O10
c)CaO
d)Anhyd. CaCl2
3)what is the degree and order of the differential equation
∂2y/∂x2=ln(∂y/∂x)
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6 Answers
11Q2 CaO (IIT-JEE question) it does not react with NH3
Q3) order is 2 but degree not defined
1for Q3
let dy/dx=y1 and d2y/dx2=y2
the eqn is y2=lny1
=> y1=ey2
=> y1=1 + y2 + y22/2! + y23/3! ........
so order is 2 degree not defined. am i correct?
1yes ..
the same goes for eg like
d2y/dx2=sin(dy/dx)
degree not defined!!
1please explain how you have made 3x+4y+1=0 and x+y+3 =0 , whereas there square is involved in the given eqation , there it is a quardatic equation in x and y . please give complete exp;lai9nation.
1@ peas : its becoz it sum of 2 squares = 0 here
and ve know every square ≥ 0
so each = 0 in this case !
i mean if a2 + b2 = 0
then a = b = 0