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Inessa [10]
3 years ago
14

2^n-5×5^n-4=5

Mathematics
1 answer:
Papessa [141]3 years ago
3 0

\huge{\fbox{\sf{n=5 }}}

Step 1:

⇒ {2}^{n - 5}   \times  {5}^{n - 4}  = 5

Step 2:

⇒{2}^{n - 5}  \times  {5}^{n - 4}  =  {5}^{1}  \times  {2}^{0}

On comparing values we get:

Taking:

{2}^{n - 5}  =  {2}^{0}

n-5=0

n=5✓

or

Taking:

{5}^{n - 4}  =  {5}^{1}

n-4=1

n=5✓

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