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Indices — MATHEMATICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9MATHEMATICSIndices1 Mark
MCQ
If $2^{x+1}+2^x=3$, then $3^x+3^{-x}=$
  • A
    0
  • B
    1
  • ✓
    2
  • D
    $\frac{4}{3}$
✓

Answer

Correct option: C.
2
C

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