જો $5^{x-1} + 5 \cdot (0.2)^{x-2} = 26$ હોય,તો $x$ ની કિંમત શું હોઈ શકે?

  • A
    $2$
  • B
    $1$
  • C
    $3$
  • D
    આમાંથી કોઈ નહીં

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$16^5 \times 5^{16}$ ના દશાંશ વિસ્તરણમાં અંકોની સંખ્યા કેટલી છે?

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