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				   If a,b,c,d are in G.P. while a-2,b-7,c-9,d-5 are in A.P., then a+b+c+d is divided by?


a)2 b)3 c)5 d)7

4 years ago

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Answers : (1)

										a=-3

b=-6
c=-12
d=-24.
4 years ago

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Sum to n terms of the series 1.3.5.7 + 3.5.7.9+............
 
 
first find the nth term of the series 1,3,5,7,........are in first place …........nth term=1+(n-1)2=2n-1 nth term=a+(n-1)d 3,5,7,9.........are in second place.........nth term=3+(n-1)2=2n+1 ...
 
noogler 9 months ago
 
∑(2n-1)(2n+1)(2n+3)(2n+5)
 
saibhargav 7 months ago
 
∑(2n-1)(2n+1)(2n+3)(2n+5)
 
OUTPASS 7 months ago
what is the difference b/w permutation and combination
 
 
Both are similar, the only difference lies in order of arrangement of articles. For eg if fruit salad contains combination of apples, grapes and bananas then, we don't care what order...
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Bhavya 13 days ago
 
permutation means arrangements of elements .combination means selection of elements this the main difference between permutation and combination
 
RAMCHANDRARAO 11 days ago
x 2 +2x+1=0,x=?
 
 
for this question is the expansion is x^2+2x+1=0 for u have put x= -1 in that equqtion you will get 0 so x= -1 value is satisfies the equation so that the answer is x= -1 thank u boss
 
AMMANANNA 11 days ago
 
roots for the equation ( x 2 +2x+1) is x=-1 this equation also written as (x+1)^2=0 that implies x+1=0 therefore x=-1
 
RAMCHANDRARAO 11 days ago
 
-1=x.
 
OUTPASS 7 months ago
find dy/dx if y=e xloga +e alogx +e aloga
 
 
since i have told earlier the formula so here y=a x +x a +a a therefore dy/dx=a x log a+ax a-1 +a a log a
 
Revti Raman 10 months ago
how to study the logarithms table
 
 
Assuming that you have a table of 4-figure logarithms to base 10 (known as Common Logarithms) with numbers 10 to 99 down the left hand column, and 1-9 across the top of the main columns,...
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Avinash 9 months ago
 
GO TO LINK AND EXPLORE
 
Aakash 9 months ago
what is vector
 
 
A vector is a quantity or phenomenon that has two independent properties: magnitude and direction. The term also denotes the mathematical or geometrical representation of such a quantity....
 
AJITH 7 months ago
 
WHICH QUANTITY HAS BOTH MAGNITUDE AND DIRECTION IS CALLED VECTOR.
 
sai kumar 7 months ago
 
A physical quantity , which has both magnitude and direction is called vector . Ex – force , velocity { not speed } , displacement { not distance } , accelaration , etc
 
sri tanish 7 months ago
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