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Sequences and Series — MATHS STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceMATHSSequences and Series1 Mark
MCQ
What is n th term of a G.P.?
  • A
    an = a + (n-1) d
  • B
    an = a + (n) d
  • C
    an = a × rn-1
  • D
    an = a × rn
✓

Answer

  1. an = a × rn-1

Solution:

Since every term of an G.P. is r times the previous term.

i.e. an+1 = an * r = an-1 * r2 = ….. = a1 * rn

or an = a*rn-1

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