Q. 64.3( 6 Votes )

Which term of the GP is -128?

Answer :

Given GP is ….


The given GP is of the form, a, ar, ar2, ar3….


Where r is the common ratio.


The first term in the given GP,


The second term in GP,


Now, the common ratio,



Let us consider -128 as the nth term of the GP.


Now, nth term of GP is, an = arn – 1


n – 1


2)n = 1024 = (-2)10


n = 10


So, -128 is the 10th term in GP.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Calculations of Geometrical IsomersCalculations of Geometrical IsomersCalculations of Geometrical Isomers59 mins
Geometric ProgressionGeometric ProgressionGeometric Progression58 mins
Learn Sum of Series by Method of DifferenceLearn Sum of Series by Method of DifferenceLearn Sum of Series by Method of Difference34 mins
Quiz on Geometric progressionQuiz on Geometric progressionQuiz on Geometric progression6 mins
Introduction to Geometrical IsomerismIntroduction to Geometrical IsomerismIntroduction to Geometrical Isomerism57 mins
Geometrical Isomerism  in Cyclic CompoundsGeometrical Isomerism  in Cyclic CompoundsGeometrical Isomerism in Cyclic Compounds49 mins
All formulas of Harmonic ProgressionAll formulas of Harmonic ProgressionAll formulas of Harmonic Progression36 mins
Practise Test on  Harmonic ProgressionPractise Test on  Harmonic ProgressionPractise Test on Harmonic Progression37 mins
Different Categories of Geometrical IsomerismDifferent Categories of Geometrical IsomerismDifferent Categories of Geometrical Isomerism48 mins
Arithmetic progression | Understanding the basicsArithmetic progression | Understanding the basicsArithmetic progression | Understanding the basics45 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses