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b) ;c) .Sửa lại hai phép tính cho đúng. (rút gọn phân thức)
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b) ;
c) .
Sửa lại hai phép tính cho đúng. (rút gọn phân thức)
From 0,1,2,3,4 and 5, we choose two different number x and y . what is the largest possible value of \(2\left(x+y\right)^2+\left(x-y\right)^2\)
In triangle ABC the points D and E are the intersections of the angular bisectors from C and B with the sides AB and AC respectively. Points F and G on the extentions of AB and AC beyond B and C respectively, satisfy BF= CG= BC. Prove that FG//DE.
Consider an acute triangle ABC of area S. Let CD vuong goc AB(D thuoc AB), DM vuong goc AC (M thuoc AC) and DN vuong goc BC(N thuoc BC). Denote by H1 and H2 the orthocentres of the triangle MNC, MND respectively. Find the area of the qudrilateral AH1BH2 in terms of S.
Let a,b be the roots of equation \(x^2-px+q=0\) and let c,d be the roots of the equation \(x^2-rx+s=0\), where p,q,r,s are some positive real numbers. Suppose that :
\(M=\frac{2\left(abc+bcd+cda+dab\right)}{p^2+q^2+r^2+s^2}\)
is an integer. Determine a,b,c,d .
What is the largest integer n that satisfies (100^2-99^2)(99^2-98^2)...(3^2-2^2)(2^2-1^2) is divisible by 3^n?
let a<b<c<d be integers. If one of the roots pf the equation (x-a)(x-b)(x-c)(x-d) - 9 is x=7, what is a+b+c+d?
Find n if n and \(n^3+2n^2+2n+4\) are both perfect square numbers
Given and . Evaluate .Answer: Evaluate , given and .Answer: giúp mk vs
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Given and
. Evaluate
.
Answer:
Evaluate , given
and
.
Answer:
giúp mk vs