Home
Class 12
MATHS
If a(1)=2 and a(n)=2a(n-1)+5 for ngt1, t...

If `a_(1)=2` and `a_(n)=2a_(n-1)+5` for `ngt1`, the value of `sum_(r=2)^(5)a_(r)` is

A

130

B

160

C

190

D

220

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • SEQUENCES AND SERIES

    ARIHANT MATHS|Exercise Exercise For Session 2|11 Videos

  • SEQUENCES AND SERIES

    ARIHANT MATHS|Exercise Exercise For Session 3|15 Videos

  • SEQUENCES AND SERIES

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|38 Videos

  • PROPERTIES AND SOLUTION OF TRIANGLES

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|21 Videos

  • SETS, RELATIONS AND FUNCTIONS

    ARIHANT MATHS|Exercise Exercise (Questions Asked In Previous 13 Years Exam)|12 Videos

Similar Questions

Explore conceptually related problems

For a sequence a_(n),a_(1)=2 If (a_(n+1))/(a_(n))=(1)/(3) then find the value of sum_(r=1)^(oo)a_(r)

Let (:a_(n):) be a sequence given by a_(n+1)=3a_(n)-2*a_(n-1) and a_(0)=2,a_(1)=3 then the value of sum_(n=1)^(oo)(1)/(a_(n)-1) equals (A) 1 (B) (1)/(2) (C) 2 D) 4

If a_(1)=2 and a_(n)-a_(n-1)=2n(n>=2), find the value of a_(1)+a_(2)+a_(3)+....+a_(20)

If n in N and if (1+4x+4x^(2))^(n)=sum_(r=0)^(2a)a_(r)x^(r) where a_(0),a_(1),a_(2),......,a_(2n) are real numbers. The value of 2sum_(r=0)^(n)a_(2r), is

For a sequence {a_(n)},a_(1)=2 and (a_(n+1))/(a_(n))=(1)/(3) then sum_(r=1)^(20)a_(r) is

Equation x^(n)-1=0, ngt1, n in N," has roots "1,a_(1),a_(2),…,a_(n-1). The value of sum_(r=1)^(n-1) (1)/(2-a_(r)) is

For a sequence, if a_(1)=2 and (a_(n+1))/(a_(n))=(1)/(3). Then, sum_(r=1)^(20) a_(r) is

If a_(n) is a geometric sequence with a_(1)=2 and a_(5)=18, then the value of a_(1)+a_(3)+a_(5)+a_(7) is equal to

If (1+x+x^(2))^(3n+1)=a_(0)+a_(1)x+a_(2)x^(2)+…a_(6n+2)x^(6n+2) , then find the value of sum_(r=0)^(2n)(a_(3r)-(a_(3r+1)+a_(3r+2))/2) is