The sum of the values of x for which 7^(1+x)+7^(1-x)=50
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Answered by
7
Answer:
2
Step-by-step explanation:
7^[1+x] + 7^[x-1] = 50 ⇒ 7^[1+x] + 7^[x-1] = 7^2 + 7^0
1+x = 2 x-1=0
x=2-1=1 x=1
sum of values of x= 1+1=2
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0
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