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The geometric mean between -9 and -16 is...

The geometric mean between -9 and -16 is `12` b. `-12` c. `-13` d. none of these

A

12

B

-12

C

-13

D

13

Text Solution

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-SEQUENCES AND SERIES-Exercise
  1. Find the sum of integers from 1 to 100 that are divisible by 2 or 5...

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  2. Find the sum of n terms of the sequence (x+1/x)^2,(x^2+1/(x^2))^2,(x^3...

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  3. The geometric mean between -9 and -16 is 12 b. -12 c. -13 d. none of t...

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  4. The sum of n terms of an A.P. is 3n^(2)+5. The number of term which eq...

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  5. If the pth, qth, and rth terms of an A.P. are in G.P., then the common...

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  6. If log2,log(2^x-1)a n dlog2log(2^x+3) are in A.P., write the value of ...

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  7. If S denotes the sum to infinity and Sn the sum of n terms of the seri...

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  8. If x ,y ,z are distinct positive numbers, then prove that (x+y)(y+z)(z...

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  9. a, b, c are sides of a triangle and a, b, c are in GP If log a- log ...

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  10. about to only mathematics

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  11. If x^(a)=x^(b//2)z^(b//2)=z^(c), then a,b,c are in

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  12. A G.P. consists of an even number of terms. If the sum of all the t...

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  13. The interior angles of a polygon are in A.P. the smallest angle is 120...

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  14. For what value of b, will the roots of the equation cos x=b, -1legle1 ...

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  16. Find the sum of the series 1+(4)/(5)+(7)/(5^(2))+(10)/(5^(3))+"....." ...

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  17. about to only mathematics

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  18. the determinant |{:(a,,b,,aalpha+b),(b,,c,,balpha+c),(aalpha+b,,balpha...

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  19. Find the sum 1+(1+2)+(1+2+2^(2))+(1+2+2^(2)+2^(3))+ …. To n terms.

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  20. If a,b,c are in H.P., then the value of ((1)/(b)+(1)/(c)-(1)/(a))((1...

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