Processing math: 26%




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1.

For a sequence (tn) , if  Sn=5(2n1) then tn  = ............


A) 5(2n+1)

B) 5×2n4

C) 5(2n1)

D) 2×(2n1)5



2.

Derivative of  sin1(t1+t2) with respect to  cos1(11+t2) is 


A) 1

B) cot t

C) tan t

D) 0



3.

In \triangle ABC  , with the usual notations , if 

(\tan \frac{A}{2})(\tan \frac{B}{2})=\frac{3}{4}   then a+b=.....


A) 4c

B) 2c

C) 7c

D) 3c



4.

Let X be the number of successes in 'n'  independent Bernoulli trials with probability of success p= \frac{3}{4}. The least value of 'n'  so that   P(X\geq1)\geq 0.9375  is 


A) 2

B) 1

C) 4

D) 3



5.

a and b are non-collinnear vectors .if c= (x-2) a +b and d= (2x+1) a-b are collinear vectors, then the value of x = 


A) \frac{1}{2}

B) \frac{1}{4}

C) \frac{1}{5}

D) \frac{1}{3}



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