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Becky
A river flows at a constant speed of 5km/h. A canoiest paddles downstream at 10km in 30 mins. She then paddles?
A river flows at a constant speed of 5km/h. A canoiest paddles downstream at 10km in 30 mins.
She then paddles at the same rate upstream to her starting point. How long did the entire journey take?
5 AntwortenMathematicsvor 8 JahrenHow many times must a dice be rolled so that the probability of rolling at least one six is greater than 95%?
help plz!!!
2 AntwortenMathematicsvor 8 Jahrentangents are drawn from (0.5, 0.5) to P &Q on parabola x^2 = -4y.how do you find equation of chord of contact?
and coordinates of P & Q?
4 AntwortenMathematicsvor 8 Jahrenhow do you show y = x - 2 is a tangent to parabola x^2 = 8y ?
and how do you find coordinates of point of contact?
3 AntwortenMathematicsvor 8 Jahrenhow does (sqrt2)^9 = 16(sqrt2) ?
3 AntwortenMathematicsvor 8 JahrenHow do you sketch |z - 3 + i| ≤ 5 and |z + i| ≤ |z - i|?
have no idea how to do this
1 AntwortMathematicsvor 8 JahrenHow do you find (sqrt(3 - i))^6 ?
need help with this easy question please!
2 AntwortenMathematicsvor 8 JahrenWhat is arg(z - (conjugate of z)) where z = 7 - 3i?
not sure how to do this :(
2 AntwortenMathematicsvor 8 JahrenHow do you prove: (1-cosx)/(sinx) = tan(x/2)?
How do you prove: (1-cosx)/(sinx) = tan(x/2)
I'm so confused! :(((
1 AntwortMathematicsvor 8 JahrenIf A,B,C are angles of a triangle prove that (cosA+isinA)(cosB+isinB)-(cosC+isincC)=0?
If A, B, C are the angles of a triangle, prove that (cosA + isinA)(cosB + isinB) - (cosC + isincC) = 0
please help as noone can help me yet..
2 AntwortenMathematicsvor 9 JahrenComplex numbers. How can I realize (-8+3i)/(-2-4i)?
When I realize:
(2+2i)/(1+2i)
i get (8-i)/5
How can I realise (-8+3i)/(-2-4i)?
6 AntwortenMathematicsvor 10 JahrenCan you please critique or comment on this picture of a college guy? [girls only thanks!]?
he needs more abs and biceps but what else does he need to really work on?
picture:
1 AntwortSingles & Datingvor 10 JahrenBy the mean value theorem or otherwise, show that 1 + x < e^x for all x > 0 and that sin x < x for all x > 0
Then show that: - ln (1 - x) < x/(1 - x) for 0 < x < 1
1 AntwortMathematicsvor 1 JahrzehntFind a number c which satisfies the conclusions of the mean value theorem for the given functions & intervals?
i) f(x) = x^3; [1, 2]
ii) f(x) = sqrt(x); [0, 2]
B) Let f(x) = 1/x: Show that there is no c∈[-1, 2] such that
f'(c) =[ f(2) - f(-1) ] / [2 - (-1)]
Why does this not contradict the mean value theorem?
2 AntwortenMathematicsvor 1 JahrzehntCan someone please help solve this Discrete Maths question?
Let A and B be points with position vectors a and b respectively, and assume that O, A and B are not collinear. Let P and Q have position vectors 3a and 7b respectively; let M be a point on the line interval PB such that PM = (7/10)PB.
1)Show that A,M and Q are collinear.
2)Find the ratio of lengths MQ/AQ.
1 AntwortMathematicsvor 1 JahrzehntWrite down the position vector of M, the mid-point of AB. Let P and Q be points on OA&OB such OP/OA=λ=OQ/OB?
Let A and B be points with position vectors a and b respectively, and let 0 < λ < 1.
Show that AQ and BP intersect at the point N with position vector: [λ(a+b)] / [1+λ]
Prove that O, M and N are collinear
1 AntwortMathematicsvor 1 JahrzehntFind in vector parametric form the equation of the line through (3, 1,−2) and (−1,−1, 6).?
Is this line parallel to the line to x = (1,−1, 1) + λ(2, 1, 4) ?
2 AntwortenMathematicsvor 1 Jahrzehnt
