Question

If 5x+1 +5x-1 = 650, then find r.​

Answer 1

answer:

27

Step-by-step explanation:

(5^x+1)+(5^x-1)=650

taking 5^x common

so we get

5^x(5+1/5)=650

5^x(25+1)/5=650

(5^(x-1))26=650

5^(x-1)=650/26

5^(x-1)=25

5^(x-1)=5^2

the bases are equal so we can equate the powers

x-1=2

x=3

we got the value of x

now we should find the value of x^x

which is 3³=27

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