3 to the power of x + 1 plus 2 times 3 to the power of x - 1 equals to 8
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Answer:
= 3^(x+1) + 5^x=8
Now take both x in 3 we will get
= 3^(2x+1)+5=8
Now, In the power (2x+1) we need (x) so [x=2-1]
Now we will get 3^1+5=8
=3+5=8
=8
Step-by-step explanation:
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