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Mathematics: Post your doubts here!
Try with 2 consecutive x values within the range, if the result is decreasing, then it is a decreasing function. I don't really know if this is a valid method, but it would work. -
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Mathematics: Post your doubts here!
You're welcome. Ah, 4 days left :(, my preparation is lacking really. -
Mathematics: Post your doubts here!
Since you're only asking about D, I'm going to guess you found M... which is (5,2) M is the midpoint between B and D The formula for midpoint would be.. (x2-x1)/2 , (y2-y1)/2 So (x2-x1)/2, where x2 is the x value of D, and x1 is the x value of B are equal to 5, the x value of M the midpt... -
Mathematics: Post your doubts here!
AB = OB - OA AB = (2-5)i+(7-1)j+(p-2)k = -3i + 6j + 2k Now make it a unit vector, so we can later multiply the magnitude of the vector we need (28) to get the vector itself. For that you'll need to find the modulus by finding the square root of the sum of i^2, j^2 and k^2... That gives you... -
Mathematics: Post your doubts here!
Yes that's especially hard. Imagine if no functions question comes in our exam, awesome. (y) -
Mathematics: Post your doubts here!
To be honest... I find vectors one of the easier topics. Functions is pretty hard.. :unsure: -
Mathematics: Post your doubts here!
They didn't ask for the unit vector, they just asked for the vector and its magnitude, I guess I forgot to mention the magnitude... Well the magnitude is the square root of the sum of i^2, j ^2, k^2. Which is √(i^2+j^2+k^2). Which is √(4^2 + 4^2 + 5^2) = √57. Unit vector would be another... -
Mathematics: Post your doubts here!
OD = 4i+4j+5k Now why? Well, start with 4i, this is because the length OA is 14m, and DE is 6, you need to subtract 6 from 14 and then divide by two, as this is how you'll get the length of i... Think about it, because I don't know how else to explain it :D . 4j because it goes halfway through... -
Mathematics: Post your doubts here!
That's enough really because it's a straight line lol, no use of a third point o_O -
Mathematics: Post your doubts here!
tbh I didn't read it, it was too long :D This is much shorter... thanks. and btw it's written "capiche". -
Mathematics: Post your doubts here!
Yes... get to the point please. Rofl I'm not an idiot, I can get it in one go. -
Mathematics: Post your doubts here!
I realize there's an easier way. But I don't know what exactly is the easier way lol... Care to explain it? -
Mathematics: Post your doubts here!
Take a look at iKhaled's solution. Although mine takes a way different route, by drawing the tangents and completing traingle QPI, where I is the point of intersection of the two tangents. Length of one of the tangents would be a, the other would be b, and c would be length QP. Then substitute... -
Chemistry: Post your doubts here!
That's what I'm doing, didn't touch an mcq so far... Since there'll be about 1 month for those. -
Mathematics: Post your doubts here!
a^2 = b^2 + c^2 -2abcosq ... I guess? Lol Would take some time because you'd have to find the point of intersection and then find the two lengths of the tangents from their respective points of tangency to the point of intersection (i hope this part is clear :p ) and find the length of c, the... -
Mathematics: Post your doubts here!
OR is a tangent to the circle inside at point R... So angle ORC = 90. That's something, lol still thinking :D -
Mathematics: Post your doubts here!
According to the ms, no. But it would make your graph more accurate I guess.... and it's very simple, just replace y=0 and solve the eqn. -
Pure Mathematics 1- Post ur doubts here!
I can try to help as well :) -
A level Biology: Post your doubts here!
They'll probably put vesicles near the Golgi apparatus in the diagram.