একটি সমবাহু ত্রিভুজের প্রতিটি বাহ্যিক কোণের\r\n পরিমাপ খুঁজুন। | 9 | সঙ্গতিপূর্ণ ত্রিভুজ...

If n = 9 and r = 5, then (n-r)! = ………….

Evaluate (n - r) !, when : (i) n=6, r=2 (ii) n=9, r=5

Evaluate (n!)/((n-r)!) , when (i) n = 6, r = 2 (ii) n = 9, r = 5

If A={1,2,3},\ B="{"1,4,6,9"]"a n d\ R is a relation from A to B defined by x is greater than ydot The range of R is A. {1,4,6,9} B. {4,6,9} C. {1} D. none of these ANSWER: C

For each positive integer n, let A_(n)=max{(C(n,r)0<=r<=n} then the number of elements n in {1,2...20} for 1.9<=(A_(n))/(A_(n-1))<=2 is

Find the wrong term of the given series: B 0R, G3U, E3P, J7S, H9N

Draw the images P' , Q' and R' of the point P, Q and R respectively in the line n (Fig . 9. 18). Join P' Q' and Q' R' to form an angle P' Q' R' Measure angle PQR and angle P' Q' R' . Are the two angles equal ?

In Figure, A B C D is a trapezium in which A B\ D C\ a n d\ D C=40\ c m\ a n d\ A B=60\ c mdot If X\ a n d\ Y are, respectively, the mid-points of A D\ a n d\ B C , prove that: a r\ (t r a pdotD C Y X)=9/(11)\ a r\ (t r a pdot(X Y B A)