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Solve for x :4^x3^(x-1//2)=3^(x+1//2)-2^...

Solve for `x :4^x3^(x-1//2)=3^(x+1//2)-2^(2x-1)` .

A

`(1)/(2)`

B

`(3)/(2)`

C

`(5)/(2)`

D

1

Text Solution

Verified by Experts

The correct Answer is:
B

We have,
`4^(x) + 2^(2x -1) = 3^(x + (1)/(2)) + 3^(x - (1)/(2))`
`rArr 2 xx 2^(2x-1) + 2^(2x-1) = 3^(x-(1)/(2)) xx 3 + 3^(x-(1)/(2))`
`rArr 2^(2x-1)(2 + 1) = 3^(x-(1)/(2))(3+1)`
`rArr 2^(2x-1) xx 3 = 3^(x-(1)/(2)) xx 4`
`rArr 2^(2x-3) = 3^(x-(3)/(2))`
`rArr (2^(2))^(x-(3)/(2)) = 3^(x-(3)/(2)) rArr 4^(x-(3)/(2)) = 3^(x-(3)/(2)) rArr x- (3)/(2) = 0 rArr x = (3)/(2)`
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OBJECTIVE RD SHARMA ENGLISH-LOGARITHMS-Section I - Solved Mcqs
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  2. If 5^x=(0. 5)^y=1000 , then 1/x-1/y=

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  3. Solve for x :4^x3^(x-1//2)=3^(x+1//2)-2^(2x-1) .

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  4. If (logx)/(2a+3b-5c)=(log y)/(2b+3c-5a)=(log z)/(2c=3a-5b') then xyz=

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  5. I flogx=(logy)/2=(logz)/5, th ten x^4y^3z^(- 2)=

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  6. If loga=1/2 logb=1/5logc then a^4b^3c^(-2)=

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  7. If a=log(24)12,b=log(48)36 and c=log(36)24, abc is equal to

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  8. If a,b,c are any three consecutive integers , prove that log(1+ac)=2lo...

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  9. If ("log"(a)x)/("log"(ab)x) = 4 + k + "log"(a)b, "then" k=

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  10. If a = 1 + log(x) yz, b = 1 + log(y) zx and c = 1 + log xy where x, ...

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  11. (1)/("log"(2)n) + (1)/("log"(3)n) + (1)/("log"(4)n) + … + (1)/("log"(4...

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  12. If n is a natural number such that n=P1^(a1)P2^(a2)P3^(a3)...Pk^(ak) ...

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  13. Prove that number (log)2 7 is an irrational number.

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  14. If in a right angled triangle, a\ a n d\ b are the lengths of sides...

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  15. If (1)/("log"(2)a) + (1)/("log"(4)a) + (1)/("log"(8)a) + (1)/("log"(16...

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  16. If "log"(3) a xx "log"(a) x = 4, then x is equal to

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  17. The value of x^("log"(x) a xx "log"(a)y xx "log"(y) z) is

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  18. If "log"(ax)x, "log"(bx) x, "log"(cx)x are in H.P., where a, b, c, x b...

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  19. If the left hand side of the equation a(b-c)x^2+b(c-a) xy+c(a-b)y^2=...

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  20. If loga/(b-c) = logb/(c-a) = logc/(a-b), then a^(b+c).b^(c+a).c^(a+b)...

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